./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/xor1.i --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_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/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_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/xor1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/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_d209dcc8-71c1-4868-8ee8-6fdedf72897b/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 fa90627ffc045ef90595d49d60ca0f6095b53b667a9d0f028eb93e7bf4c6c579 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:45:14,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:45:14,507 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:45:14,514 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:45:14,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:45:14,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:45:14,564 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:45:14,565 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:45:14,566 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:45:14,568 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:45:14,568 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:45:14,569 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:45:14,569 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:45:14,569 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:45:14,572 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:45:14,573 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:45:14,573 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:45:14,574 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:45:14,574 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:45:14,575 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:45:14,579 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:45:14,581 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:45:14,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:45:14,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:45:14,583 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:45:14,583 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:45:14,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:45:14,584 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:45:14,584 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:45:14,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:45:14,589 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:45:14,589 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:45:14,590 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:45:14,590 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:45:14,590 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:45:14,591 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:45:14,591 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:45:14,591 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:45:14,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:45:14,592 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:45:14,592 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:45:14,596 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:45:14,596 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:45:14,596 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:45:14,597 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:45:14,597 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:45:14,598 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:45:14,598 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_d209dcc8-71c1-4868-8ee8-6fdedf72897b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa90627ffc045ef90595d49d60ca0f6095b53b667a9d0f028eb93e7bf4c6c579 [2024-11-09 05:45:14,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:45:15,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:45:15,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:45:15,009 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:45:15,010 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:45:15,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-crafted/xor1.i Unable to find full path for "g++" [2024-11-09 05:45:17,392 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:45:17,638 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:45:17,639 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/sv-benchmarks/c/array-crafted/xor1.i [2024-11-09 05:45:17,682 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/data/afd47d319/67fbe89b5de84c7cbdb89527416724de/FLAG697abbd8d [2024-11-09 05:45:17,981 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/data/afd47d319/67fbe89b5de84c7cbdb89527416724de [2024-11-09 05:45:17,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:45:17,985 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:45:17,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:45:17,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:45:17,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:45:17,994 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:45:17" (1/1) ... [2024-11-09 05:45:17,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31665333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:17, skipping insertion in model container [2024-11-09 05:45:17,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:45:17" (1/1) ... [2024-11-09 05:45:18,017 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:45:18,236 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_d209dcc8-71c1-4868-8ee8-6fdedf72897b/sv-benchmarks/c/array-crafted/xor1.i[1285,1298] [2024-11-09 05:45:18,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:45:18,251 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:45:18,275 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_d209dcc8-71c1-4868-8ee8-6fdedf72897b/sv-benchmarks/c/array-crafted/xor1.i[1285,1298] [2024-11-09 05:45:18,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:45:18,296 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:45:18,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18 WrapperNode [2024-11-09 05:45:18,296 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:45:18,298 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:45:18,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:45:18,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:45:18,306 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,338 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2024-11-09 05:45:18,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:45:18,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:45:18,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:45:18,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:45:18,348 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,363 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,367 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,368 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:45:18,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:45:18,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:45:18,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:45:18,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (1/1) ... [2024-11-09 05:45:18,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:45:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:18,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:45:18,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:45:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:45:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:45:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 05:45:18,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 05:45:18,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:45:18,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:45:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 05:45:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2024-11-09 05:45:18,446 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2024-11-09 05:45:18,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 05:45:18,516 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:45:18,518 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:45:18,741 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-09 05:45:18,741 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:45:18,848 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:45:18,848 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:45:18,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:45:18 BoogieIcfgContainer [2024-11-09 05:45:18,849 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:45:18,851 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:45:18,851 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:45:18,855 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:45:18,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:45:17" (1/3) ... [2024-11-09 05:45:18,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c839a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:45:18, skipping insertion in model container [2024-11-09 05:45:18,856 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:45:18" (2/3) ... [2024-11-09 05:45:18,856 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c839a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:45:18, skipping insertion in model container [2024-11-09 05:45:18,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:45:18" (3/3) ... [2024-11-09 05:45:18,858 INFO L112 eAbstractionObserver]: Analyzing ICFG xor1.i [2024-11-09 05:45:18,878 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:45:18,878 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:45:18,944 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:45:18,953 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;@3f81669, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:45:18,953 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:45:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 05:45:18,967 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:18,969 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:18,971 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:18,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash -2229402, now seen corresponding path program 1 times [2024-11-09 05:45:18,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:18,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252571706] [2024-11-09 05:45:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:45:19,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:19,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252571706] [2024-11-09 05:45:19,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252571706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:45:19,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:45:19,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:45:19,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273792394] [2024-11-09 05:45:19,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:45:19,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:45:19,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:19,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:45:19,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:45:19,419 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:45:19,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:19,488 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2024-11-09 05:45:19,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:45:19,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-11-09 05:45:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:19,497 INFO L225 Difference]: With dead ends: 45 [2024-11-09 05:45:19,497 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 05:45:19,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 05:45:19,504 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:19,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:45:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 05:45:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 05:45:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-11-09 05:45:19,549 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 25 [2024-11-09 05:45:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:19,549 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-11-09 05:45:19,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 05:45:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-11-09 05:45:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 05:45:19,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:19,552 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:19,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:45:19,553 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:19,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 908294059, now seen corresponding path program 1 times [2024-11-09 05:45:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571031185] [2024-11-09 05:45:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:45:19,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:19,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571031185] [2024-11-09 05:45:19,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571031185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:19,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745283456] [2024-11-09 05:45:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:19,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:19,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:19,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:19,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:45:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:19,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:45:19,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 05:45:19,946 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:45:19,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745283456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:45:19,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:45:19,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-09 05:45:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817926258] [2024-11-09 05:45:19,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:45:19,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:45:19,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:19,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:45:19,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:45:19,953 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:45:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:20,008 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-11-09 05:45:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:45:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-09 05:45:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:20,010 INFO L225 Difference]: With dead ends: 41 [2024-11-09 05:45:20,010 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 05:45:20,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:45:20,012 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:20,014 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:45:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 05:45:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 05:45:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-09 05:45:20,024 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2024-11-09 05:45:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:20,025 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-09 05:45:20,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:45:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-09 05:45:20,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 05:45:20,027 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:20,028 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:20,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:45:20,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 05:45:20,233 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:20,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1012222379, now seen corresponding path program 1 times [2024-11-09 05:45:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:20,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256351375] [2024-11-09 05:45:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 05:45:20,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:20,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256351375] [2024-11-09 05:45:20,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256351375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244489335] [2024-11-09 05:45:20,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:20,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:20,428 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:20,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:45:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:20,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:45:20,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:45:20,579 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:45:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244489335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:45:20,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:45:20,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-09 05:45:20,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316045420] [2024-11-09 05:45:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:45:20,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:45:20,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:45:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:45:20,585 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:45:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:20,618 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-09 05:45:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:45:20,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-09 05:45:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:20,620 INFO L225 Difference]: With dead ends: 40 [2024-11-09 05:45:20,620 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 05:45:20,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:45:20,622 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:20,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:45:20,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 05:45:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 05:45:20,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-09 05:45:20,629 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 33 [2024-11-09 05:45:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:20,631 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-09 05:45:20,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 05:45:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-09 05:45:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 05:45:20,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:20,635 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:20,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:45:20,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:20,836 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:20,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1105859066, now seen corresponding path program 1 times [2024-11-09 05:45:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507618096] [2024-11-09 05:45:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:20,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:45:20,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507618096] [2024-11-09 05:45:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507618096] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946615047] [2024-11-09 05:45:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:20,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:20,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:20,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:20,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:45:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:21,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:45:21,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:45:21,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:45:21,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946615047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [205282476] [2024-11-09 05:45:21,242 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:45:21,244 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:21,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:21,254 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:21,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:22,941 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:45:23,269 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:28,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '705#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_14| Int) (|v_ULTIMATE.start_main_~ret~0#1_14| Int) (|v_ULTIMATE.start_main_~ret5~0#1_14| Int)) (and (<= |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483647) (<= |v_ULTIMATE.start_main_~ret~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483648)) (or (and (exists ((|v_#memory_int_31| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_31| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_31| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_49 Int)) (= (mod v_xor_~res~0_49 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_14|))) (and (exists ((|v_#memory_int_31| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_31| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_31| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_49 Int)) (= (mod v_xor_~res~0_49 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_14| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_14| |v_ULTIMATE.start_main_~ret5~0#1_14|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_14| |v_ULTIMATE.start_main_~ret~0#1_14|))) (<= |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483647))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:45:28,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:28,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:28,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-09 05:45:28,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408309159] [2024-11-09 05:45:28,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:28,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:45:28,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:45:28,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=448, Unknown=6, NotChecked=0, Total=552 [2024-11-09 05:45:28,733 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:45:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:28,819 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-09 05:45:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:45:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 35 [2024-11-09 05:45:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:28,820 INFO L225 Difference]: With dead ends: 54 [2024-11-09 05:45:28,821 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 05:45:28,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=98, Invalid=448, Unknown=6, NotChecked=0, Total=552 [2024-11-09 05:45:28,822 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:28,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:45:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 05:45:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 05:45:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-09 05:45:28,840 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 35 [2024-11-09 05:45:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:28,840 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-09 05:45:28,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:45:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-09 05:45:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 05:45:28,842 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:28,842 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:28,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:45:29,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:29,043 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:29,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1635444663, now seen corresponding path program 2 times [2024-11-09 05:45:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:29,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614644684] [2024-11-09 05:45:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:45:29,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614644684] [2024-11-09 05:45:29,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614644684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:29,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736718781] [2024-11-09 05:45:29,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:45:29,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:29,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:29,174 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:29,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:45:29,280 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:45:29,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:45:29,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:45:29,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:45:29,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:45:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736718781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220694002] [2024-11-09 05:45:29,376 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:45:29,376 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:29,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:29,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:29,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:30,139 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:45:30,304 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:37,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1092#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_15| Int) (|v_ULTIMATE.start_main_~ret5~0#1_16| Int) (|v_ULTIMATE.start_main_~ret~0#1_15| Int)) (and (<= |v_ULTIMATE.start_main_~ret2~0#1_15| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_15| 2147483648)) (or (and (exists ((v_xor_~res~0_69 Int)) (= (mod v_xor_~res~0_69 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 4294967296))) (exists ((|v_#memory_int_39| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_39| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((v_xor_~res~0_69 Int)) (= (mod v_xor_~res~0_69 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_16|)) (exists ((|v_#memory_int_39| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_39| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))))) (<= |v_ULTIMATE.start_main_~ret~0#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_15| |v_ULTIMATE.start_main_~ret5~0#1_16|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_15| |v_ULTIMATE.start_main_~ret~0#1_15|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_15| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:45:37,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:37,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:37,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 05:45:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202212959] [2024-11-09 05:45:37,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:37,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:45:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:37,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:45:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=468, Unknown=31, NotChecked=0, Total=600 [2024-11-09 05:45:37,540 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:45:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:37,598 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-11-09 05:45:37,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:45:37,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-11-09 05:45:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:37,602 INFO L225 Difference]: With dead ends: 57 [2024-11-09 05:45:37,604 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 05:45:37,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=101, Invalid=468, Unknown=31, NotChecked=0, Total=600 [2024-11-09 05:45:37,606 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:37,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:45:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 05:45:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 05:45:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-09 05:45:37,620 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 41 [2024-11-09 05:45:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:37,620 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-09 05:45:37,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:45:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-09 05:45:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 05:45:37,622 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:37,622 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:37,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:45:37,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:37,823 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:37,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1794873, now seen corresponding path program 3 times [2024-11-09 05:45:37,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:37,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574947659] [2024-11-09 05:45:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:37,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 05:45:38,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574947659] [2024-11-09 05:45:38,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574947659] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765612632] [2024-11-09 05:45:38,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:45:38,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:38,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:38,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:45:38,167 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:45:38,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:45:38,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:45:38,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-09 05:45:38,235 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-09 05:45:38,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765612632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:38,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683657052] [2024-11-09 05:45:38,362 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:45:38,362 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:38,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:38,363 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:38,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:38,925 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:45:39,086 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:48,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1608#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_18| Int) (|v_ULTIMATE.start_main_~ret2~0#1_17| Int) (|v_ULTIMATE.start_main_~ret~0#1_17| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_17| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_17| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_17| |v_ULTIMATE.start_main_~ret~0#1_17|)) (not (= |v_ULTIMATE.start_main_~ret~0#1_17| |v_ULTIMATE.start_main_~ret5~0#1_18|))) (<= |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483647) (or (and (exists ((|v_#memory_int_54| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_96 Int)) (= (mod v_xor_~res~0_96 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_18|))) (and (exists ((|v_#memory_int_54| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_54| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_96 Int)) (= (mod v_xor_~res~0_96 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 4294967296))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483647))))' at error location [2024-11-09 05:45:48,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:48,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:48,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2024-11-09 05:45:48,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719431653] [2024-11-09 05:45:48,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:48,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 05:45:48,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 05:45:48,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=774, Unknown=8, NotChecked=0, Total=930 [2024-11-09 05:45:48,228 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:45:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:48,350 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2024-11-09 05:45:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:45:48,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2024-11-09 05:45:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:48,352 INFO L225 Difference]: With dead ends: 78 [2024-11-09 05:45:48,352 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 05:45:48,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=148, Invalid=774, Unknown=8, NotChecked=0, Total=930 [2024-11-09 05:45:48,354 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:48,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 119 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:45:48,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 05:45:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 05:45:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-11-09 05:45:48,366 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 59 [2024-11-09 05:45:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:48,366 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-11-09 05:45:48,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:45:48,370 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-11-09 05:45:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 05:45:48,372 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:48,372 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:48,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:45:48,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:45:48,573 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:48,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:48,574 INFO L85 PathProgramCache]: Analyzing trace with hash 86160010, now seen corresponding path program 4 times [2024-11-09 05:45:48,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:48,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924194491] [2024-11-09 05:45:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:48,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 05:45:49,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924194491] [2024-11-09 05:45:49,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924194491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:49,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806244476] [2024-11-09 05:45:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:45:49,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:49,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:49,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:49,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:45:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:49,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:45:49,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 05:45:49,289 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 05:45:49,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806244476] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:49,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [449179689] [2024-11-09 05:45:49,577 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:45:49,577 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:49,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:49,578 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:49,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:50,120 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:45:50,285 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:45:57,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2271#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_19| Int) (|v_ULTIMATE.start_main_~ret~0#1_19| Int) (|v_ULTIMATE.start_main_~ret5~0#1_20| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_19| |v_ULTIMATE.start_main_~ret5~0#1_20|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_19| |v_ULTIMATE.start_main_~ret~0#1_19|))) (<= |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483647) (or (and (exists ((v_xor_~res~0_123 Int)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 4294967296) (mod v_xor_~res~0_123 4294967296))) (exists ((|v_#memory_int_76| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_76| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_76| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((|v_#memory_int_76| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_76| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_76| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_123 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_20| (mod v_xor_~res~0_123 4294967296))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_19| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:45:57,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:45:57,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:45:57,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2024-11-09 05:45:57,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378627958] [2024-11-09 05:45:57,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:45:57,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:45:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:45:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:45:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1338, Unknown=5, NotChecked=0, Total=1722 [2024-11-09 05:45:57,347 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:45:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:45:57,455 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2024-11-09 05:45:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:45:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 73 [2024-11-09 05:45:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:45:57,456 INFO L225 Difference]: With dead ends: 104 [2024-11-09 05:45:57,457 INFO L226 Difference]: Without dead ends: 75 [2024-11-09 05:45:57,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=379, Invalid=1338, Unknown=5, NotChecked=0, Total=1722 [2024-11-09 05:45:57,458 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:45:57,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:45:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-09 05:45:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-09 05:45:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:45:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2024-11-09 05:45:57,466 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 73 [2024-11-09 05:45:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:45:57,467 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2024-11-09 05:45:57,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:45:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2024-11-09 05:45:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 05:45:57,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:45:57,469 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 12, 12, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:45:57,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:45:57,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:45:57,673 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:45:57,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:45:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash 433525574, now seen corresponding path program 5 times [2024-11-09 05:45:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:45:57,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282254723] [2024-11-09 05:45:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:45:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:45:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:45:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-09 05:45:58,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:45:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282254723] [2024-11-09 05:45:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282254723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:45:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986049885] [2024-11-09 05:45:58,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:45:58,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:45:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:45:58,644 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:45:58,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:45:58,763 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 05:45:58,763 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:45:58,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:45:58,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:45:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 88 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2024-11-09 05:45:58,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:45:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2024-11-09 05:45:58,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986049885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:45:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752138637] [2024-11-09 05:45:58,904 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:45:58,904 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:45:58,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:45:58,904 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:45:58,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:45:59,375 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:45:59,499 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:06,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3159#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~0#1_20| Int) (|v_ULTIMATE.start_main_~ret2~0#1_21| Int) (|v_ULTIMATE.start_main_~ret5~0#1_22| Int)) (and (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_21| |v_ULTIMATE.start_main_~ret~0#1_20|)) (not (= |v_ULTIMATE.start_main_~ret~0#1_20| |v_ULTIMATE.start_main_~ret5~0#1_22|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483648)) (or (and (exists ((|v_#memory_int_87| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_87| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_87| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_150 Int)) (= (mod v_xor_~res~0_150 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 4294967296)))) (and (exists ((v_xor_~res~0_150 Int)) (= (mod v_xor_~res~0_150 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_22|)) (exists ((|v_#memory_int_87| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_87| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_87| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))))) (<= |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_20| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_20| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:46:06,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:06,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:06,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2024-11-09 05:46:06,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457135091] [2024-11-09 05:46:06,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:06,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:46:06,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:06,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:46:06,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1846, Unknown=5, NotChecked=0, Total=2256 [2024-11-09 05:46:06,831 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:46:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:07,028 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2024-11-09 05:46:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 05:46:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2024-11-09 05:46:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:07,030 INFO L225 Difference]: With dead ends: 114 [2024-11-09 05:46:07,030 INFO L226 Difference]: Without dead ends: 85 [2024-11-09 05:46:07,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=405, Invalid=1846, Unknown=5, NotChecked=0, Total=2256 [2024-11-09 05:46:07,032 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:07,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 127 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:46:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-09 05:46:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2024-11-09 05:46:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:46:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2024-11-09 05:46:07,043 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 97 [2024-11-09 05:46:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:07,044 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2024-11-09 05:46:07,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 31 states have internal predecessors, (84), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:46:07,044 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2024-11-09 05:46:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 05:46:07,046 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:07,046 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 12, 12, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:46:07,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 05:46:07,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:07,251 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:07,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash -875882849, now seen corresponding path program 6 times [2024-11-09 05:46:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996620940] [2024-11-09 05:46:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:07,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-09 05:46:08,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996620940] [2024-11-09 05:46:08,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996620940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:08,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042528833] [2024-11-09 05:46:08,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:46:08,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:08,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:08,525 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:08,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:46:08,725 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:46:08,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:46:08,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:46:08,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-09 05:46:08,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-09 05:46:10,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042528833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:10,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904525883] [2024-11-09 05:46:10,152 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:46:10,152 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:10,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:10,153 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:10,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:10,630 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:46:10,795 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:18,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4156#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~0#1_22| Int) (|v_ULTIMATE.start_main_~ret2~0#1_23| Int) (|v_ULTIMATE.start_main_~ret5~0#1_24| Int)) (and (or (not (= |v_ULTIMATE.start_main_~ret~0#1_22| |v_ULTIMATE.start_main_~ret5~0#1_24|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_23| |v_ULTIMATE.start_main_~ret~0#1_22|))) (<= |v_ULTIMATE.start_main_~ret2~0#1_23| 2147483647) (or (and (exists ((v_xor_~res~0_177 Int)) (= (mod v_xor_~res~0_177 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 4294967296))) (exists ((|v_#memory_int_126| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_126| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_126| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((|v_#memory_int_126| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_126| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_126| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_177 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_24| (mod v_xor_~res~0_177 4294967296))))) (<= |v_ULTIMATE.start_main_~ret~0#1_22| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_23| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_22| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_24| 2147483647))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:46:18,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:18,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:18,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 51 [2024-11-09 05:46:18,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208351536] [2024-11-09 05:46:18,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:18,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 05:46:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:18,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 05:46:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=3198, Unknown=5, NotChecked=0, Total=4556 [2024-11-09 05:46:18,280 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 51 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 51 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:46:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:18,571 INFO L93 Difference]: Finished difference Result 170 states and 202 transitions. [2024-11-09 05:46:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 05:46:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 51 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 107 [2024-11-09 05:46:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:18,574 INFO L225 Difference]: With dead ends: 170 [2024-11-09 05:46:18,575 INFO L226 Difference]: Without dead ends: 134 [2024-11-09 05:46:18,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1353, Invalid=3198, Unknown=5, NotChecked=0, Total=4556 [2024-11-09 05:46:18,577 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:18,578 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 128 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:46:18,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-09 05:46:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-11-09 05:46:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:46:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2024-11-09 05:46:18,592 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 107 [2024-11-09 05:46:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:18,593 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2024-11-09 05:46:18,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 51 states have internal predecessors, (119), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:46:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2024-11-09 05:46:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-09 05:46:18,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:18,596 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 12, 12, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:46:18,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:46:18,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:18,797 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:18,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:18,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1999975708, now seen corresponding path program 7 times [2024-11-09 05:46:18,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:18,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565862183] [2024-11-09 05:46:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:18,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:22,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-09 05:46:22,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565862183] [2024-11-09 05:46:22,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565862183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:22,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304804780] [2024-11-09 05:46:22,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:46:22,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:22,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:22,381 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:22,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:46:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:22,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 05:46:22,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-09 05:46:22,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-09 05:46:26,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304804780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:26,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040144341] [2024-11-09 05:46:26,858 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:46:26,858 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:26,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:26,858 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:26,858 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:27,306 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:46:27,416 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:29,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5663#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_25| Int) (|v_ULTIMATE.start_main_~ret5~0#1_26| Int) (|v_ULTIMATE.start_main_~ret~0#1_24| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_25| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_24| |v_ULTIMATE.start_main_~ret5~0#1_26|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_25| |v_ULTIMATE.start_main_~ret~0#1_24|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_24| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_24| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_26| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_25| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_26| 2147483647) (or (and (exists ((v_xor_~res~0_204 Int)) (= (mod v_xor_~res~0_204 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_26|)) (exists ((|v_#memory_int_190| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_190| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_190| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((|v_#memory_int_190| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_190| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_190| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_204 Int)) (= (mod v_xor_~res~0_204 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_26| 4294967296))))))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:46:29,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:29,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:29,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2024-11-09 05:46:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386642856] [2024-11-09 05:46:29,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:29,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-09 05:46:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-09 05:46:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5129, Invalid=8673, Unknown=4, NotChecked=0, Total=13806 [2024-11-09 05:46:29,319 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 101 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:46:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:29,911 INFO L93 Difference]: Finished difference Result 270 states and 327 transitions. [2024-11-09 05:46:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-09 05:46:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 157 [2024-11-09 05:46:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:29,915 INFO L225 Difference]: With dead ends: 270 [2024-11-09 05:46:29,915 INFO L226 Difference]: Without dead ends: 234 [2024-11-09 05:46:29,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2953 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5129, Invalid=8673, Unknown=4, NotChecked=0, Total=13806 [2024-11-09 05:46:29,920 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:29,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 92 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:46:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-09 05:46:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2024-11-09 05:46:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0131004366812226) internal successors, (232), 229 states have internal predecessors, (232), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:46:29,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 238 transitions. [2024-11-09 05:46:29,941 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 238 transitions. Word has length 157 [2024-11-09 05:46:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:29,942 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 238 transitions. [2024-11-09 05:46:29,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:46:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 238 transitions. [2024-11-09 05:46:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2024-11-09 05:46:29,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:29,948 INFO L215 NwaCegarLoop]: trace histogram [98, 98, 12, 12, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:46:29,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:46:30,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:46:30,154 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:30,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash 944789078, now seen corresponding path program 8 times [2024-11-09 05:46:30,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:30,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172012001] [2024-11-09 05:46:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:30,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9820 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2024-11-09 05:46:41,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:41,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172012001] [2024-11-09 05:46:41,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172012001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:41,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472477331] [2024-11-09 05:46:41,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:46:41,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:41,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:41,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:41,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:46:41,607 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 05:46:41,607 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:46:41,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:46:41,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9820 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 9718 trivial. 0 not checked. [2024-11-09 05:46:41,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:46:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9820 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 9718 trivial. 0 not checked. [2024-11-09 05:46:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472477331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:46:42,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57504731] [2024-11-09 05:46:42,377 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:46:42,378 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:46:42,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:46:42,378 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:46:42,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:46:42,959 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:46:43,087 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:46:46,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8080#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_28| Int) (|v_ULTIMATE.start_main_~ret2~0#1_26| Int) (|v_ULTIMATE.start_main_~ret~0#1_25| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_28| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_25| 2147483648)) (or (and (exists ((|v_#memory_int_198| (Array Int (Array Int Int)))) (= (store |v_#memory_int_198| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_198| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))) |#memory_int|)) (exists ((v_xor_~res~0_236 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_28| (mod v_xor_~res~0_236 4294967296)))) (and (exists ((v_xor_~res~0_236 Int)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_28| 4294967296) (mod v_xor_~res~0_236 4294967296))) (exists ((|v_#memory_int_198| (Array Int (Array Int Int)))) (= (store |v_#memory_int_198| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_198| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))) |#memory_int|)))) (<= |v_ULTIMATE.start_main_~ret5~0#1_28| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_26| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_26| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_26| |v_ULTIMATE.start_main_~ret~0#1_25|)) (not (= |v_ULTIMATE.start_main_~ret~0#1_25| |v_ULTIMATE.start_main_~ret5~0#1_28|))) (<= |v_ULTIMATE.start_main_~ret~0#1_25| 2147483647))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:46:46,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:46:46,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:46:46,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 7, 7] total 111 [2024-11-09 05:46:46,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828518628] [2024-11-09 05:46:46,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:46:46,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-11-09 05:46:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:46:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-11-09 05:46:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5195, Invalid=11291, Unknown=26, NotChecked=0, Total=16512 [2024-11-09 05:46:46,079 INFO L87 Difference]: Start difference. First operand 234 states and 238 transitions. Second operand has 111 states, 111 states have (on average 2.2072072072072073) internal successors, (245), 111 states have internal predecessors, (245), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:46:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:46:46,643 INFO L93 Difference]: Finished difference Result 285 states and 302 transitions. [2024-11-09 05:46:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-09 05:46:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.2072072072072073) internal successors, (245), 111 states have internal predecessors, (245), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 257 [2024-11-09 05:46:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:46:46,647 INFO L225 Difference]: With dead ends: 285 [2024-11-09 05:46:46,647 INFO L226 Difference]: Without dead ends: 249 [2024-11-09 05:46:46,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 743 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=5195, Invalid=11291, Unknown=26, NotChecked=0, Total=16512 [2024-11-09 05:46:46,655 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:46:46,656 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:46:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-09 05:46:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2024-11-09 05:46:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:46:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2024-11-09 05:46:46,699 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 257 [2024-11-09 05:46:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:46:46,700 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2024-11-09 05:46:46,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.2072072072072073) internal successors, (245), 111 states have internal predecessors, (245), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:46:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2024-11-09 05:46:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2024-11-09 05:46:46,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:46:46,707 INFO L215 NwaCegarLoop]: trace histogram [99, 99, 30, 30, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:46:46,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:46:46,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:46:46,908 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:46:46,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:46:46,908 INFO L85 PathProgramCache]: Analyzing trace with hash 219766551, now seen corresponding path program 9 times [2024-11-09 05:46:46,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:46:46,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452636993] [2024-11-09 05:46:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:46:46,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:46:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:46:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2024-11-09 05:46:57,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:46:57,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452636993] [2024-11-09 05:46:57,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452636993] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:46:57,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442745632] [2024-11-09 05:46:57,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:46:57,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:46:57,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:46:57,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:46:57,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:46:58,447 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:46:58,447 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:46:58,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-09 05:46:58,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:46:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2024-11-09 05:46:58,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 10809 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2024-11-09 05:47:04,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442745632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:04,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697593491] [2024-11-09 05:47:04,960 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:47:04,961 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:04,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:04,961 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:04,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:05,317 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:47:05,406 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:13,926 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10761#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_30| Int) (|v_ULTIMATE.start_main_~ret2~0#1_28| Int) (|v_ULTIMATE.start_main_~ret~0#1_27| Int)) (and (or (and (exists ((v_xor_~res~0_281 Int)) (= (mod v_xor_~res~0_281 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_30|)) (exists ((|v_#memory_int_313| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_313| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_313| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((v_xor_~res~0_281 Int)) (= (mod v_xor_~res~0_281 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_30| 4294967296))) (exists ((|v_#memory_int_313| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_313| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_313| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))))) (<= |v_ULTIMATE.start_main_~ret2~0#1_28| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_30| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_27| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_27| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_30| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_28| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_27| |v_ULTIMATE.start_main_~ret5~0#1_30|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_28| |v_ULTIMATE.start_main_~ret~0#1_27|))))))' at error location [2024-11-09 05:47:13,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:13,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:13,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 102] total 103 [2024-11-09 05:47:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919431353] [2024-11-09 05:47:13,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:13,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-09 05:47:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-09 05:47:13,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5330, Invalid=8944, Unknown=6, NotChecked=0, Total=14280 [2024-11-09 05:47:13,933 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 103 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:47:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:14,444 INFO L93 Difference]: Finished difference Result 298 states and 306 transitions. [2024-11-09 05:47:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-09 05:47:14,446 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 295 [2024-11-09 05:47:14,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:14,448 INFO L225 Difference]: With dead ends: 298 [2024-11-09 05:47:14,448 INFO L226 Difference]: Without dead ends: 250 [2024-11-09 05:47:14,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 766 SyntacticMatches, 101 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 7373 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=5330, Invalid=8944, Unknown=6, NotChecked=0, Total=14280 [2024-11-09 05:47:14,452 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:14,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 74 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:47:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-09 05:47:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2024-11-09 05:47:14,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0122448979591836) internal successors, (248), 245 states have internal predecessors, (248), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:47:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 254 transitions. [2024-11-09 05:47:14,468 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 254 transitions. Word has length 295 [2024-11-09 05:47:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:14,469 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 254 transitions. [2024-11-09 05:47:14,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 05:47:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 254 transitions. [2024-11-09 05:47:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2024-11-09 05:47:14,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:14,476 INFO L215 NwaCegarLoop]: trace histogram [100, 100, 30, 30, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:14,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:47:14,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:14,677 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:14,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash -306258276, now seen corresponding path program 10 times [2024-11-09 05:47:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777868538] [2024-11-09 05:47:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:14,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11008 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 10462 trivial. 0 not checked. [2024-11-09 05:47:15,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:15,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777868538] [2024-11-09 05:47:15,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777868538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:15,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378639949] [2024-11-09 05:47:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:47:15,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:15,578 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:15,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:47:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:16,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 05:47:16,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11008 backedges. 444 proven. 100 refuted. 0 times theorem prover too weak. 10464 trivial. 0 not checked. [2024-11-09 05:47:16,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11008 backedges. 0 proven. 546 refuted. 0 times theorem prover too weak. 10462 trivial. 0 not checked. [2024-11-09 05:47:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378639949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:16,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758803836] [2024-11-09 05:47:16,546 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:47:16,546 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:16,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:16,547 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:16,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:17,012 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:47:17,153 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:20,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13398#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~0#1_29| Int) (|v_ULTIMATE.start_main_~ret5~0#1_32| Int) (|v_ULTIMATE.start_main_~ret2~0#1_30| Int)) (and (<= |v_ULTIMATE.start_main_~ret~0#1_29| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_29| |v_ULTIMATE.start_main_~ret5~0#1_32|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_30| |v_ULTIMATE.start_main_~ret~0#1_29|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_32| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_30| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_32| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_30| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_29| 2147483648)) (or (and (exists ((v_xor_~res~0_337 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_32| (mod v_xor_~res~0_337 4294967296))) (exists ((|v_#memory_int_329| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_329| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_329| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((v_xor_~res~0_337 Int)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_32| 4294967296) (mod v_xor_~res~0_337 4294967296))) (exists ((|v_#memory_int_329| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_329| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_329| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))))))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:47:20,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:20,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:20,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-09 05:47:20,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738437634] [2024-11-09 05:47:20,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:20,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 05:47:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 05:47:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1339, Unknown=5, NotChecked=0, Total=1722 [2024-11-09 05:47:20,344 INFO L87 Difference]: Start difference. First operand 250 states and 254 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:47:20,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:20,467 INFO L93 Difference]: Finished difference Result 320 states and 341 transitions. [2024-11-09 05:47:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 05:47:20,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 297 [2024-11-09 05:47:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:20,470 INFO L225 Difference]: With dead ends: 320 [2024-11-09 05:47:20,470 INFO L226 Difference]: Without dead ends: 274 [2024-11-09 05:47:20,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 861 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=378, Invalid=1339, Unknown=5, NotChecked=0, Total=1722 [2024-11-09 05:47:20,472 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:20,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:47:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-09 05:47:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2024-11-09 05:47:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.0111524163568772) internal successors, (272), 269 states have internal predecessors, (272), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:47:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 278 transitions. [2024-11-09 05:47:20,489 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 278 transitions. Word has length 297 [2024-11-09 05:47:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:20,490 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 278 transitions. [2024-11-09 05:47:20,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 25 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:47:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 278 transitions. [2024-11-09 05:47:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2024-11-09 05:47:20,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:20,494 INFO L215 NwaCegarLoop]: trace histogram [100, 100, 66, 66, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:20,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:47:20,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:20,695 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:20,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash 350720660, now seen corresponding path program 11 times [2024-11-09 05:47:20,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:20,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220841691] [2024-11-09 05:47:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:20,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14536 backedges. 0 proven. 2514 refuted. 0 times theorem prover too weak. 12022 trivial. 0 not checked. [2024-11-09 05:47:22,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220841691] [2024-11-09 05:47:22,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220841691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:22,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189559174] [2024-11-09 05:47:22,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:47:22,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:22,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:22,908 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:22,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:47:23,468 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 05:47:23,468 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:47:23,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:47:23,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14536 backedges. 2032 proven. 36 refuted. 0 times theorem prover too weak. 12468 trivial. 0 not checked. [2024-11-09 05:47:23,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14536 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14500 trivial. 0 not checked. [2024-11-09 05:47:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189559174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736560421] [2024-11-09 05:47:23,888 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:47:23,888 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:23,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:23,888 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:23,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:24,287 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:47:24,405 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:28,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16550#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret~0#1_30| Int) (|v_ULTIMATE.start_main_~ret5~0#1_34| Int) (|v_ULTIMATE.start_main_~ret2~0#1_32| Int)) (and (<= |v_ULTIMATE.start_main_~ret2~0#1_32| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_30| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_30| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_34| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_34| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_30| |v_ULTIMATE.start_main_~ret5~0#1_34|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_32| |v_ULTIMATE.start_main_~ret~0#1_30|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_32| 2147483648)) (or (and (exists ((v_xor_~res~0_418 Int)) (= (mod v_xor_~res~0_418 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_34| 4294967296))) (exists ((|v_#memory_int_344| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_344| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_344| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((v_xor_~res~0_418 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_34| (mod v_xor_~res~0_418 4294967296))) (exists ((|v_#memory_int_344| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_344| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_344| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))))))))' at error location [2024-11-09 05:47:28,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:28,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:28,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2024-11-09 05:47:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828468697] [2024-11-09 05:47:28,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:28,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 05:47:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 05:47:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=497, Invalid=2578, Unknown=5, NotChecked=0, Total=3080 [2024-11-09 05:47:28,128 INFO L87 Difference]: Start difference. First operand 274 states and 278 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 39 states have internal predecessors, (99), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:47:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:28,366 INFO L93 Difference]: Finished difference Result 363 states and 381 transitions. [2024-11-09 05:47:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 05:47:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 39 states have internal predecessors, (99), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 369 [2024-11-09 05:47:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:28,370 INFO L225 Difference]: With dead ends: 363 [2024-11-09 05:47:28,371 INFO L226 Difference]: Without dead ends: 293 [2024-11-09 05:47:28,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1075 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=497, Invalid=2578, Unknown=5, NotChecked=0, Total=3080 [2024-11-09 05:47:28,373 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:28,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 249 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:47:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2024-11-09 05:47:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2024-11-09 05:47:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0104529616724738) internal successors, (290), 287 states have internal predecessors, (290), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:47:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 296 transitions. [2024-11-09 05:47:28,400 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 296 transitions. Word has length 369 [2024-11-09 05:47:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:28,401 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 296 transitions. [2024-11-09 05:47:28,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 39 states have internal predecessors, (99), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:47:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 296 transitions. [2024-11-09 05:47:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2024-11-09 05:47:28,405 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:28,405 INFO L215 NwaCegarLoop]: trace histogram [100, 100, 69, 69, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:28,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:47:28,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:28,606 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:28,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1649792934, now seen corresponding path program 12 times [2024-11-09 05:47:28,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:28,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132225287] [2024-11-09 05:47:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:28,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15107 backedges. 0 proven. 2743 refuted. 0 times theorem prover too weak. 12364 trivial. 0 not checked. [2024-11-09 05:47:30,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:30,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132225287] [2024-11-09 05:47:30,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132225287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:30,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276549564] [2024-11-09 05:47:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:47:30,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:30,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:30,989 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:30,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:47:31,768 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:47:31,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:47:31,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 1592 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 05:47:31,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15107 backedges. 2212 proven. 529 refuted. 0 times theorem prover too weak. 12366 trivial. 0 not checked. [2024-11-09 05:47:31,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15107 backedges. 0 proven. 2743 refuted. 0 times theorem prover too weak. 12364 trivial. 0 not checked. [2024-11-09 05:47:33,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276549564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:33,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408234678] [2024-11-09 05:47:33,023 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:47:33,024 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:33,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:33,024 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:33,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:33,402 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:47:33,507 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:34,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19937#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~0#1_32| Int) (|v_ULTIMATE.start_main_~ret2~0#1_34| Int) (|v_ULTIMATE.start_main_~ret5~0#1_36| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_32| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_36| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_34| 2147483648)) (or (and (exists ((|v_#memory_int_368| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_368| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_368| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_526 Int)) (= (mod v_xor_~res~0_526 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_36| 4294967296)))) (and (exists ((|v_#memory_int_368| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_368| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_368| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_526 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_36| (mod v_xor_~res~0_526 4294967296))))) (<= |v_ULTIMATE.start_main_~ret~0#1_32| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_34| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_32| |v_ULTIMATE.start_main_~ret5~0#1_36|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_34| |v_ULTIMATE.start_main_~ret~0#1_32|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_36| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:47:34,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:34,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:34,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2024-11-09 05:47:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276341443] [2024-11-09 05:47:34,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:34,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 05:47:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 05:47:34,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1354, Invalid=3198, Unknown=4, NotChecked=0, Total=4556 [2024-11-09 05:47:34,909 INFO L87 Difference]: Start difference. First operand 292 states and 296 transitions. Second operand has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 51 states have internal predecessors, (123), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:47:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:35,150 INFO L93 Difference]: Finished difference Result 430 states and 464 transitions. [2024-11-09 05:47:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 05:47:35,151 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 51 states have internal predecessors, (123), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 391 [2024-11-09 05:47:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:35,154 INFO L225 Difference]: With dead ends: 430 [2024-11-09 05:47:35,154 INFO L226 Difference]: Without dead ends: 342 [2024-11-09 05:47:35,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 1130 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1354, Invalid=3198, Unknown=4, NotChecked=0, Total=4556 [2024-11-09 05:47:35,162 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:35,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:47:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-09 05:47:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2024-11-09 05:47:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.0089020771513353) internal successors, (340), 337 states have internal predecessors, (340), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:47:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 346 transitions. [2024-11-09 05:47:35,190 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 346 transitions. Word has length 391 [2024-11-09 05:47:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:35,191 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 346 transitions. [2024-11-09 05:47:35,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.411764705882353) internal successors, (123), 51 states have internal predecessors, (123), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:47:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 346 transitions. [2024-11-09 05:47:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2024-11-09 05:47:35,196 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:35,197 INFO L215 NwaCegarLoop]: trace histogram [144, 144, 100, 100, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:35,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 05:47:35,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:47:35,398 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:35,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash -849221888, now seen corresponding path program 13 times [2024-11-09 05:47:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:35,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195089874] [2024-11-09 05:47:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 31232 backedges. 0 proven. 11718 refuted. 0 times theorem prover too weak. 19514 trivial. 0 not checked. [2024-11-09 05:47:42,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:47:42,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195089874] [2024-11-09 05:47:42,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195089874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:47:42,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429314415] [2024-11-09 05:47:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:47:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:47:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:47:42,008 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:47:42,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 05:47:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:47:42,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 1967 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 05:47:42,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:47:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31232 backedges. 9412 proven. 2304 refuted. 0 times theorem prover too weak. 19516 trivial. 0 not checked. [2024-11-09 05:47:43,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:47:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 31232 backedges. 0 proven. 11718 refuted. 0 times theorem prover too weak. 19514 trivial. 0 not checked. [2024-11-09 05:47:47,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429314415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:47:47,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [779456058] [2024-11-09 05:47:47,604 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:47:47,605 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:47:47,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:47:47,605 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:47:47,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:47:48,160 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:47:48,298 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:47:54,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24450#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_36| Int) (|v_ULTIMATE.start_main_~ret5~0#1_38| Int) (|v_ULTIMATE.start_main_~ret~0#1_34| Int)) (and (or (not (= |v_ULTIMATE.start_main_~ret~0#1_34| |v_ULTIMATE.start_main_~ret5~0#1_38|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_36| |v_ULTIMATE.start_main_~ret~0#1_34|))) (or (and (exists ((v_xor_~res~0_734 Int)) (= (mod v_xor_~res~0_734 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_38|)) (exists ((|v_#memory_int_392| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_392| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_392| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((v_xor_~res~0_734 Int)) (= (mod v_xor_~res~0_734 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_38| 4294967296))) (exists ((|v_#memory_int_392| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_392| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_392| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))))) (<= |v_ULTIMATE.start_main_~ret2~0#1_36| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_34| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_34| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_38| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_38| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_36| 2147483648)))))' at error location [2024-11-09 05:47:54,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:47:54,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:47:54,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2024-11-09 05:47:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790519720] [2024-11-09 05:47:54,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:47:54,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-09 05:47:54,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:47:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-09 05:47:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5128, Invalid=8673, Unknown=5, NotChecked=0, Total=13806 [2024-11-09 05:47:54,182 INFO L87 Difference]: Start difference. First operand 342 states and 346 transitions. Second operand has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 101 states have internal predecessors, (223), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:47:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:47:54,666 INFO L93 Difference]: Finished difference Result 580 states and 639 transitions. [2024-11-09 05:47:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-09 05:47:54,667 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 101 states have internal predecessors, (223), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 541 [2024-11-09 05:47:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:47:54,670 INFO L225 Difference]: With dead ends: 580 [2024-11-09 05:47:54,670 INFO L226 Difference]: Without dead ends: 442 [2024-11-09 05:47:54,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1672 GetRequests, 1555 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2951 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=5128, Invalid=8673, Unknown=5, NotChecked=0, Total=13806 [2024-11-09 05:47:54,672 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:47:54,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 154 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:47:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2024-11-09 05:47:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2024-11-09 05:47:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.0068649885583525) internal successors, (440), 437 states have internal predecessors, (440), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:47:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2024-11-09 05:47:54,691 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 541 [2024-11-09 05:47:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:47:54,692 INFO L471 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2024-11-09 05:47:54,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.207920792079208) internal successors, (223), 101 states have internal predecessors, (223), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:47:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2024-11-09 05:47:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2024-11-09 05:47:54,700 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:47:54,701 INFO L215 NwaCegarLoop]: trace histogram [294, 294, 100, 100, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:47:54,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 05:47:54,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 05:47:54,901 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:47:54,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:47:54,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1681663796, now seen corresponding path program 14 times [2024-11-09 05:47:54,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:47:54,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598250743] [2024-11-09 05:47:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:47:54,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:47:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 97232 backedges. 0 proven. 48418 refuted. 0 times theorem prover too weak. 48814 trivial. 0 not checked. [2024-11-09 05:48:16,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:16,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598250743] [2024-11-09 05:48:16,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598250743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:16,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144766482] [2024-11-09 05:48:16,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:48:16,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:16,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:16,775 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:16,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 05:48:18,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 05:48:18,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:48:18,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:48:18,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 97232 backedges. 38816 proven. 196 refuted. 0 times theorem prover too weak. 58220 trivial. 0 not checked. [2024-11-09 05:48:19,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 97232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 97036 trivial. 0 not checked. [2024-11-09 05:48:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144766482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2095042654] [2024-11-09 05:48:21,134 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:48:21,134 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:21,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:21,135 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:21,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:21,521 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:48:21,655 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:25,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31168#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_40| Int) (|v_ULTIMATE.start_main_~ret2~0#1_38| Int) (|v_ULTIMATE.start_main_~ret~0#1_35| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_38| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_38| |v_ULTIMATE.start_main_~ret~0#1_35|)) (not (= |v_ULTIMATE.start_main_~ret~0#1_35| |v_ULTIMATE.start_main_~ret5~0#1_40|))) (or (and (exists ((v_xor_~res~0_1043 Int)) (= (mod v_xor_~res~0_1043 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_40|)) (exists ((|v_#memory_int_415| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_415| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_415| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396)))))) (and (exists ((v_xor_~res~0_1043 Int)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_40| 4294967296) (mod v_xor_~res~0_1043 4294967296))) (exists ((|v_#memory_int_415| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_415| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_415| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_40| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_40| 2147483647) (<= |v_ULTIMATE.start_main_~ret~0#1_35| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_38| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_35| 2147483648)))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:48:25,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:25,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:25,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 17, 17] total 131 [2024-11-09 05:48:25,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822211263] [2024-11-09 05:48:25,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:25,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-11-09 05:48:25,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-11-09 05:48:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5625, Invalid=16127, Unknown=4, NotChecked=0, Total=21756 [2024-11-09 05:48:25,051 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:48:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:25,881 INFO L93 Difference]: Finished difference Result 714 states and 740 transitions. [2024-11-09 05:48:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-11-09 05:48:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 841 [2024-11-09 05:48:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:25,887 INFO L225 Difference]: With dead ends: 714 [2024-11-09 05:48:25,887 INFO L226 Difference]: Without dead ends: 476 [2024-11-09 05:48:25,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2622 GetRequests, 2475 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5593 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=5625, Invalid=16127, Unknown=4, NotChecked=0, Total=21756 [2024-11-09 05:48:25,891 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:25,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 168 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:48:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-11-09 05:48:25,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 476. [2024-11-09 05:48:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.0063694267515924) internal successors, (474), 471 states have internal predecessors, (474), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:48:25,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 480 transitions. [2024-11-09 05:48:25,916 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 480 transitions. Word has length 841 [2024-11-09 05:48:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:25,917 INFO L471 AbstractCegarLoop]: Abstraction has 476 states and 480 transitions. [2024-11-09 05:48:25,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 05:48:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 480 transitions. [2024-11-09 05:48:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2024-11-09 05:48:25,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:25,934 INFO L215 NwaCegarLoop]: trace histogram [297, 297, 100, 100, 30, 30, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:25,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 05:48:26,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:48:26,135 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:48:26,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -919612306, now seen corresponding path program 15 times [2024-11-09 05:48:26,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:26,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534085494] [2024-11-09 05:48:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:26,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 99715 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 98815 trivial. 0 not checked. [2024-11-09 05:48:32,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:32,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534085494] [2024-11-09 05:48:32,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534085494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:32,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141270149] [2024-11-09 05:48:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:48:32,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:32,443 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:32,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 05:48:33,886 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:48:33,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:48:33,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 05:48:33,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 99715 backedges. 39608 proven. 900 refuted. 0 times theorem prover too weak. 59207 trivial. 0 not checked. [2024-11-09 05:48:34,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 99715 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 98815 trivial. 0 not checked. [2024-11-09 05:48:35,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141270149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:35,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1858358884] [2024-11-09 05:48:35,995 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:48:35,995 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:35,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:35,996 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:35,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:48:36,351 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:48:36,554 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:48:38,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38300#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_42| Int) (|v_ULTIMATE.start_main_~ret~0#1_36| Int) (|v_ULTIMATE.start_main_~ret2~0#1_40| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_40| 2147483648)) (or (and (exists ((|v_#memory_int_454| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_454| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_454| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_1355 Int)) (= (mod v_xor_~res~0_1355 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_42|))) (and (exists ((|v_#memory_int_454| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_454| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_454| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_1355 Int)) (= (mod v_xor_~res~0_1355 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_42| 4294967296))))) (<= |v_ULTIMATE.start_main_~ret2~0#1_40| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_42| 2147483647) (<= |v_ULTIMATE.start_main_~ret~0#1_36| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_42| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_36| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~0#1_36| |v_ULTIMATE.start_main_~ret5~0#1_42|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_40| |v_ULTIMATE.start_main_~ret~0#1_36|))))))' at error location [2024-11-09 05:48:38,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:48:38,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:48:38,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-11-09 05:48:38,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922792559] [2024-11-09 05:48:38,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:48:38,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 05:48:38,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:48:38,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 05:48:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2159, Invalid=4479, Unknown=4, NotChecked=0, Total=6642 [2024-11-09 05:48:38,168 INFO L87 Difference]: Start difference. First operand 476 states and 480 transitions. Second operand has 65 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 65 states have internal predecessors, (147), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:48:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:48:38,501 INFO L93 Difference]: Finished difference Result 748 states and 784 transitions. [2024-11-09 05:48:38,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-09 05:48:38,502 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 65 states have internal predecessors, (147), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 879 [2024-11-09 05:48:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:48:38,507 INFO L225 Difference]: With dead ends: 748 [2024-11-09 05:48:38,507 INFO L226 Difference]: Without dead ends: 540 [2024-11-09 05:48:38,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2668 GetRequests, 2587 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2159, Invalid=4479, Unknown=4, NotChecked=0, Total=6642 [2024-11-09 05:48:38,510 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:48:38,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:48:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2024-11-09 05:48:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2024-11-09 05:48:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 535 states have (on average 1.005607476635514) internal successors, (538), 535 states have internal predecessors, (538), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:48:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 544 transitions. [2024-11-09 05:48:38,538 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 544 transitions. Word has length 879 [2024-11-09 05:48:38,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:48:38,540 INFO L471 AbstractCegarLoop]: Abstraction has 540 states and 544 transitions. [2024-11-09 05:48:38,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 65 states have internal predecessors, (147), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:48:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 544 transitions. [2024-11-09 05:48:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 944 [2024-11-09 05:48:38,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:48:38,554 INFO L215 NwaCegarLoop]: trace histogram [297, 297, 100, 100, 62, 62, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:48:38,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 05:48:38,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 05:48:38,755 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:48:38,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:48:38,756 INFO L85 PathProgramCache]: Analyzing trace with hash -899193586, now seen corresponding path program 16 times [2024-11-09 05:48:38,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:48:38,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358018375] [2024-11-09 05:48:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:48:38,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:48:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 102659 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 98815 trivial. 0 not checked. [2024-11-09 05:48:52,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:48:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358018375] [2024-11-09 05:48:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358018375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:48:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980399195] [2024-11-09 05:48:52,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:48:52,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:48:52,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:48:52,033 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:48:52,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 05:48:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:48:53,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 05:48:53,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:48:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 102659 backedges. 39608 proven. 3844 refuted. 0 times theorem prover too weak. 59207 trivial. 0 not checked. [2024-11-09 05:48:53,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:48:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 102659 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 98815 trivial. 0 not checked. [2024-11-09 05:48:59,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980399195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:48:59,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1116011165] [2024-11-09 05:48:59,493 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 05:48:59,493 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:48:59,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:48:59,494 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:48:59,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:49:00,017 INFO L197 IcfgInterpreter]: Interpreting procedure xor with input of size 10 for LOIs [2024-11-09 05:49:00,154 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:49:04,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46000#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret5~0#1_44| Int) (|v_ULTIMATE.start_main_~ret~0#1_37| Int) (|v_ULTIMATE.start_main_~ret2~0#1_42| Int)) (and (or (and (exists ((|v_#memory_int_525| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_525| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_525| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_1667 Int)) (= |v_ULTIMATE.start_main_~ret5~0#1_44| (mod v_xor_~res~0_1667 4294967296)))) (and (exists ((|v_#memory_int_525| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_525| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_525| |ULTIMATE.start_main_~#x~0#1.base|) 396 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 396))))) (exists ((v_xor_~res~0_1667 Int)) (= (+ |v_ULTIMATE.start_main_~ret5~0#1_44| 4294967296) (mod v_xor_~res~0_1667 4294967296))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_44| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~0#1_37| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_42| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_42| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~0#1_37| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_42| |v_ULTIMATE.start_main_~ret~0#1_37|)) (not (= |v_ULTIMATE.start_main_~ret~0#1_37| |v_ULTIMATE.start_main_~ret5~0#1_44|))) (<= |v_ULTIMATE.start_main_~ret5~0#1_44| 2147483647))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 05:49:04,614 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:49:04,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:49:04,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2024-11-09 05:49:04,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952741897] [2024-11-09 05:49:04,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:49:04,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2024-11-09 05:49:04,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:49:04,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2024-11-09 05:49:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5229, Invalid=8808, Unknown=5, NotChecked=0, Total=14042 [2024-11-09 05:49:04,619 INFO L87 Difference]: Start difference. First operand 540 states and 544 transitions. Second operand has 102 states, 102 states have (on average 2.1862745098039214) internal successors, (223), 102 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:49:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:49:05,167 INFO L93 Difference]: Finished difference Result 822 states and 863 transitions. [2024-11-09 05:49:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-09 05:49:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.1862745098039214) internal successors, (223), 102 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 943 [2024-11-09 05:49:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:49:05,173 INFO L225 Difference]: With dead ends: 822 [2024-11-09 05:49:05,174 INFO L226 Difference]: Without dead ends: 614 [2024-11-09 05:49:05,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2892 GetRequests, 2747 SyntacticMatches, 28 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4115 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=5229, Invalid=8808, Unknown=5, NotChecked=0, Total=14042 [2024-11-09 05:49:05,177 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:49:05,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 122 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:49:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2024-11-09 05:49:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2024-11-09 05:49:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 609 states have (on average 1.0049261083743843) internal successors, (612), 609 states have internal predecessors, (612), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 05:49:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 618 transitions. [2024-11-09 05:49:05,207 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 618 transitions. Word has length 943 [2024-11-09 05:49:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:49:05,209 INFO L471 AbstractCegarLoop]: Abstraction has 614 states and 618 transitions. [2024-11-09 05:49:05,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.1862745098039214) internal successors, (223), 102 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 05:49:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 618 transitions. [2024-11-09 05:49:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1018 [2024-11-09 05:49:05,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:49:05,224 INFO L215 NwaCegarLoop]: trace histogram [297, 297, 100, 100, 99, 99, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:49:05,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 05:49:05,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d209dcc8-71c1-4868-8ee8-6fdedf72897b/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:49:05,425 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:49:05,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:49:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash 564197031, now seen corresponding path program 17 times [2024-11-09 05:49:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:49:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197231990] [2024-11-09 05:49:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:49:05,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms