./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max10-1.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_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/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_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/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_55b1db09-b7fb-4037-a2c4-d62d75218673/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 1223a7fef027dae15fda123c8ce40ec49dc779b7d5d627ded9a670697417439e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:28:40,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:28:40,700 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:28:40,706 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:28:40,706 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:28:40,757 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:28:40,758 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:28:40,758 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:28:40,759 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:28:40,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:28:40,760 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:28:40,761 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:28:40,761 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:28:40,761 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:28:40,762 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:28:40,763 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:28:40,763 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:28:40,764 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:28:40,764 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:28:40,765 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:28:40,765 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:28:40,766 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:28:40,767 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:28:40,767 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:28:40,768 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:28:40,768 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:28:40,768 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:28:40,783 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:28:40,783 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:28:40,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:28:40,784 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:28:40,785 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:28:40,785 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:28:40,785 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:28:40,790 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:28:40,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:28:40,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:28:40,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:28:40,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:28:40,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:28:40,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:28:40,797 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:28:40,797 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:28:40,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:28:40,797 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:28:40,798 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:28:40,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:28:40,798 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_55b1db09-b7fb-4037-a2c4-d62d75218673/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1223a7fef027dae15fda123c8ce40ec49dc779b7d5d627ded9a670697417439e [2024-11-09 07:28:41,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:28:41,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:28:41,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:28:41,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:28:41,182 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:28:41,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/reducercommutativity/max10-1.i Unable to find full path for "g++" [2024-11-09 07:28:43,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:28:43,592 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:28:43,609 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/sv-benchmarks/c/reducercommutativity/max10-1.i [2024-11-09 07:28:43,624 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/data/3eb1a4d4a/3dcf627c50784b609cc313eef630f090/FLAG700c964f7 [2024-11-09 07:28:43,642 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/data/3eb1a4d4a/3dcf627c50784b609cc313eef630f090 [2024-11-09 07:28:43,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:28:43,648 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:28:43,650 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:28:43,650 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:28:43,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:28:43,659 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:28:43" (1/1) ... [2024-11-09 07:28:43,660 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a7a2438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:43, skipping insertion in model container [2024-11-09 07:28:43,660 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:28:43" (1/1) ... [2024-11-09 07:28:43,693 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:28:43,928 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_55b1db09-b7fb-4037-a2c4-d62d75218673/sv-benchmarks/c/reducercommutativity/max10-1.i[1290,1303] [2024-11-09 07:28:43,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:28:43,945 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:28:43,975 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_55b1db09-b7fb-4037-a2c4-d62d75218673/sv-benchmarks/c/reducercommutativity/max10-1.i[1290,1303] [2024-11-09 07:28:43,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:28:43,999 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:28:44,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44 WrapperNode [2024-11-09 07:28:44,000 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:28:44,001 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:28:44,001 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:28:44,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:28:44,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,021 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,051 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-09 07:28:44,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:28:44,052 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:28:44,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:28:44,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:28:44,065 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,090 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:28:44,103 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:28:44,103 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:28:44,103 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:28:44,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (1/1) ... [2024-11-09 07:28:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:28:44,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:28:44,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:28:44,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:28:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:28:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure max [2024-11-09 07:28:44,184 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2024-11-09 07:28:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:28:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 07:28:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:28:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:28:44,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:28:44,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:28:44,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:28:44,262 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:28:44,264 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:28:44,526 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-09 07:28:44,526 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:28:44,576 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:28:44,577 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 07:28:44,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:28:44 BoogieIcfgContainer [2024-11-09 07:28:44,577 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:28:44,581 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:28:44,581 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:28:44,585 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:28:44,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:28:43" (1/3) ... [2024-11-09 07:28:44,586 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f838c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:28:44, skipping insertion in model container [2024-11-09 07:28:44,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:28:44" (2/3) ... [2024-11-09 07:28:44,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27f838c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:28:44, skipping insertion in model container [2024-11-09 07:28:44,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:28:44" (3/3) ... [2024-11-09 07:28:44,588 INFO L112 eAbstractionObserver]: Analyzing ICFG max10-1.i [2024-11-09 07:28:44,614 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:28:44,614 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:28:44,693 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:28:44,702 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;@4948a468, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:28:44,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:28:44,707 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 07:28:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 07:28:44,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:28:44,717 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 07:28:44,718 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:28:44,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:28:44,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1016110697, now seen corresponding path program 1 times [2024-11-09 07:28:44,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:28:44,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545873940] [2024-11-09 07:28:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:44,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:28:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:45,160 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 07:28:45,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:28:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545873940] [2024-11-09 07:28:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545873940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:28:45,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:28:45,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:28:45,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59180027] [2024-11-09 07:28:45,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:28:45,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:28:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:28:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:28:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:28:45,206 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 07:28:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:28:45,287 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2024-11-09 07:28:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:28:45,290 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 07:28:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:28:45,298 INFO L225 Difference]: With dead ends: 45 [2024-11-09 07:28:45,298 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 07:28:45,301 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 07:28:45,309 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, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:28:45,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:28:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 07:28:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 07:28:45,360 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 07:28:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2024-11-09 07:28:45,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 25 [2024-11-09 07:28:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:28:45,366 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2024-11-09 07:28:45,367 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 07:28:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2024-11-09 07:28:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 07:28:45,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:28:45,369 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 07:28:45,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:28:45,371 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:28:45,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:28:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1799420700, now seen corresponding path program 1 times [2024-11-09 07:28:45,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:28:45,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552249624] [2024-11-09 07:28:45,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:45,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:28:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:45,610 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 07:28:45,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:28:45,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552249624] [2024-11-09 07:28:45,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552249624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:28:45,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935657266] [2024-11-09 07:28:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:45,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:28:45,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:28:45,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:28:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:45,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:28:45,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:28:45,765 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 07:28:45,765 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:28:45,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935657266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:28:45,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:28:45,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-09 07:28:45,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730255918] [2024-11-09 07:28:45,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:28:45,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:28:45,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:28:45,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:28:45,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:28:45,772 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 07:28:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:28:45,798 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-11-09 07:28:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:28:45,798 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 07:28:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:28:45,799 INFO L225 Difference]: With dead ends: 41 [2024-11-09 07:28:45,800 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 07:28:45,800 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 07:28:45,802 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 07:28:45,802 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 07:28:45,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 07:28:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 07:28:45,808 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 07:28:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-09 07:28:45,809 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2024-11-09 07:28:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:28:45,810 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-09 07:28:45,810 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 07:28:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-09 07:28:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:28:45,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:28:45,812 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 07:28:45,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 07:28:46,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:46,013 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:28:46,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:28:46,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1989742077, now seen corresponding path program 1 times [2024-11-09 07:28:46,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:28:46,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245183878] [2024-11-09 07:28:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:46,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:28:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:46,171 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 07:28:46,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:28:46,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245183878] [2024-11-09 07:28:46,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245183878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:28:46,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498148104] [2024-11-09 07:28:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:46,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:46,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:28:46,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:28:46,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:28:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:46,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:28:46,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:28:46,309 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 07:28:46,309 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:28:46,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498148104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:28:46,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:28:46,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-09 07:28:46,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327081995] [2024-11-09 07:28:46,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:28:46,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:28:46,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:28:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:28:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:28:46,312 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 07:28:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:28:46,342 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-09 07:28:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:28:46,343 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 07:28:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:28:46,344 INFO L225 Difference]: With dead ends: 40 [2024-11-09 07:28:46,344 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 07:28:46,345 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 07:28:46,346 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 07:28:46,347 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 07:28:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 07:28:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 07:28:46,352 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 07:28:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-11-09 07:28:46,353 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 33 [2024-11-09 07:28:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:28:46,355 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-11-09 07:28:46,355 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 07:28:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-09 07:28:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 07:28:46,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:28:46,357 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 07:28:46,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:28:46,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:46,561 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:28:46,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:28:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash -910330136, now seen corresponding path program 1 times [2024-11-09 07:28:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:28:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59214478] [2024-11-09 07:28:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:46,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:28:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:46,676 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 07:28:46,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:28:46,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59214478] [2024-11-09 07:28:46,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59214478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:28:46,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953925757] [2024-11-09 07:28:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:28:46,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:28:46,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:28:46,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:28:46,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:28:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:28:46,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:28:46,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:28:46,855 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 07:28:46,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:28:46,917 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 07:28:46,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953925757] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:28:46,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1991683626] [2024-11-09 07:28:46,945 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:28:46,945 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:28:46,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:28:46,953 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:28:46,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:28:48,489 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 07:28:48,576 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:29:22,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '705#(and (exists ((|v_ULTIMATE.start_main_~ret2~0#1_14| Int) (|v_ULTIMATE.start_main_~ret~1#1_14| Int) (|v_ULTIMATE.start_main_~ret5~0#1_14| Int)) (and (<= |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 2147483648)) (or (and (exists ((v_max_~x.offset_BEFORE_RETURN_6 Int) (v_max_~ret~0_34 Int) (v_max_~x.base_BEFORE_RETURN_6 Int)) (and (or (= (mod v_max_~ret~0_34 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296)) (= (mod v_max_~ret~0_34 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_14|)) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_6) (+ v_max_~x.offset_BEFORE_RETURN_6 36)) v_max_~ret~0_34))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int)))) (= (store |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))) |#memory_int|))) (and (exists ((v_max_~ret~0_34 Int) (v_max_~x.offset_BEFORE_RETURN_5 Int) (v_max_~x.base_BEFORE_RETURN_5 Int)) (and (or (= (mod v_max_~ret~0_34 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_14| 4294967296)) (= (mod v_max_~ret~0_34 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_14|)) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_5) (+ v_max_~x.offset_BEFORE_RETURN_5 36)) v_max_~ret~0_34))) (exists ((|v_#memory_int_30| (Array Int (Array Int Int)))) (= (store |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_30| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))) |#memory_int|)))) (<= |v_ULTIMATE.start_main_~ret~1#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_14| |v_ULTIMATE.start_main_~ret5~0#1_14|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_14| |v_ULTIMATE.start_main_~ret~1#1_14|))) (<= |v_ULTIMATE.start_main_~ret2~0#1_14| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_14| 2147483648)))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 07:29:22,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:29:22,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:29:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-09 07:29:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65868840] [2024-11-09 07:29:22,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:29:22,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:29:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:29:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:29:22,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=409, Unknown=25, NotChecked=0, Total=506 [2024-11-09 07:29:22,671 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 07:29:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:29:22,742 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-09 07:29:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:29:22,743 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 07:29:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:29:22,743 INFO L225 Difference]: With dead ends: 54 [2024-11-09 07:29:22,744 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 07:29:22,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=72, Invalid=409, Unknown=25, NotChecked=0, Total=506 [2024-11-09 07:29:22,745 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 07:29:22,748 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 07:29:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 07:29:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 07:29:22,755 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 07:29:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-09 07:29:22,756 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 35 [2024-11-09 07:29:22,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:29:22,759 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-09 07:29:22,759 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 07:29:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-09 07:29:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:29:22,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:29:22,760 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 07:29:22,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 07:29:22,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:29:22,961 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:29:22,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:29:22,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1355494647, now seen corresponding path program 2 times [2024-11-09 07:29:22,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:29:22,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267324507] [2024-11-09 07:29:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:29:22,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:29:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:29:23,127 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 07:29:23,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:29:23,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267324507] [2024-11-09 07:29:23,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267324507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:29:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621221644] [2024-11-09 07:29:23,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:29:23,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:29:23,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:29:23,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:29:23,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:29:23,226 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 07:29:23,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:29:23,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:29:23,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:29:23,249 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 07:29:23,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:29:23,294 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 07:29:23,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621221644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:29:23,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731427672] [2024-11-09 07:29:23,298 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:29:23,298 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:29:23,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:29:23,299 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:29:23,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:29:24,353 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 07:29:24,431 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:29:40,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1091#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret2~0#1_15| Int) (|v_ULTIMATE.start_main_~ret~1#1_15| Int) (|v_ULTIMATE.start_main_~ret5~0#1_16| Int)) (and (<= |v_ULTIMATE.start_main_~ret2~0#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_15| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_15| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 2147483648)) (or (and (exists ((|v_#memory_int_38| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_38| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_38| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_max_~x.offset_BEFORE_RETURN_11 Int) (v_max_~ret~0_57 Int) (v_max_~x.base_BEFORE_RETURN_11 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_11) (+ v_max_~x.offset_BEFORE_RETURN_11 36)) v_max_~ret~0_57) (or (= (mod v_max_~ret~0_57 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 4294967296)) (= |v_ULTIMATE.start_main_~ret5~0#1_16| (mod v_max_~ret~0_57 4294967296)))))) (and (exists ((|v_#memory_int_38| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_38| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_38| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_max_~x.offset_BEFORE_RETURN_12 Int) (v_max_~ret~0_57 Int) (v_max_~x.base_BEFORE_RETURN_12 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_12) (+ v_max_~x.offset_BEFORE_RETURN_12 36)) v_max_~ret~0_57) (or (= (mod v_max_~ret~0_57 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_16| 4294967296)) (= |v_ULTIMATE.start_main_~ret5~0#1_16| (mod v_max_~ret~0_57 4294967296))))))) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_15| |v_ULTIMATE.start_main_~ret~1#1_15|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_15| |v_ULTIMATE.start_main_~ret5~0#1_16|))) (<= 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 07:29:40,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:29:40,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:29:40,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 07:29:40,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631781729] [2024-11-09 07:29:40,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:29:40,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:29:40,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:29:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:29:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=438, Unknown=37, NotChecked=0, Total=552 [2024-11-09 07:29:40,298 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 07:29:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:29:40,341 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-11-09 07:29:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:29:40,342 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 07:29:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:29:40,343 INFO L225 Difference]: With dead ends: 57 [2024-11-09 07:29:40,344 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 07:29:40,344 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=77, Invalid=438, Unknown=37, NotChecked=0, Total=552 [2024-11-09 07:29:40,345 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 07:29:40,346 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 07:29:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 07:29:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 07:29:40,350 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 07:29:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-09 07:29:40,352 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 41 [2024-11-09 07:29:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:29:40,352 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-09 07:29:40,352 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 07:29:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-09 07:29:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 07:29:40,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:29:40,354 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 07:29:40,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:29:40,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:29:40,558 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:29:40,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:29:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1822142164, now seen corresponding path program 3 times [2024-11-09 07:29:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:29:40,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330392774] [2024-11-09 07:29:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:29:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:29:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:29:40,688 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 07:29:40,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:29:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330392774] [2024-11-09 07:29:40,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330392774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:29:40,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740436791] [2024-11-09 07:29:40,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:29:40,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:29:40,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:29:40,692 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:29:40,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:29:40,790 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:29:40,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:29:40,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:29:40,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:29:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 84 proven. 16 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-09 07:29:40,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:29:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-09 07:29:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740436791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:29:40,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [478629988] [2024-11-09 07:29:40,971 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:29:40,971 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:29:40,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:29:40,972 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:29:40,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:29:41,769 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 07:29:41,844 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:30:19,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1606#(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~1#1_17| Int)) (and (or (and (exists ((|v_#memory_int_48| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_max_~ret~0_92 Int) (v_max_~x.base_BEFORE_RETURN_18 Int) (v_max_~x.offset_BEFORE_RETURN_18 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_18) (+ v_max_~x.offset_BEFORE_RETURN_18 36)) v_max_~ret~0_92) (or (= (mod v_max_~ret~0_92 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 4294967296)) (= (mod v_max_~ret~0_92 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_18|))))) (and (exists ((v_max_~ret~0_92 Int) (v_max_~x.base_BEFORE_RETURN_17 Int) (v_max_~x.offset_BEFORE_RETURN_17 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_17) (+ v_max_~x.offset_BEFORE_RETURN_17 36)) v_max_~ret~0_92) (or (= (mod v_max_~ret~0_92 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 4294967296)) (= (mod v_max_~ret~0_92 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_18|)))) (exists ((|v_#memory_int_48| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_48| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))))) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_17| |v_ULTIMATE.start_main_~ret~1#1_17|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_17| |v_ULTIMATE.start_main_~ret5~0#1_18|))) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_17| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_18| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_17| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_17| 2147483647))))' at error location [2024-11-09 07:30:19,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:30:19,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:30:19,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-09 07:30:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810164016] [2024-11-09 07:30:19,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:30:19,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 07:30:19,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:30:19,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 07:30:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=721, Unknown=28, NotChecked=0, Total=870 [2024-11-09 07:30:19,540 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:30:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:30:19,621 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2024-11-09 07:30:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:30:19,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 59 [2024-11-09 07:30:19,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:30:19,623 INFO L225 Difference]: With dead ends: 76 [2024-11-09 07:30:19,623 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 07:30:19,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=121, Invalid=721, Unknown=28, NotChecked=0, Total=870 [2024-11-09 07:30:19,624 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:30:19,625 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:30:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 07:30:19,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-09 07:30:19,630 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 07:30:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2024-11-09 07:30:19,632 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 59 [2024-11-09 07:30:19,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:30:19,632 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2024-11-09 07:30:19,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:30:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2024-11-09 07:30:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 07:30:19,635 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:30:19,637 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:30:19,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:30:19,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:30:19,841 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:30:19,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:30:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash 60806651, now seen corresponding path program 4 times [2024-11-09 07:30:19,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:30:19,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286392083] [2024-11-09 07:30:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:30:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:30:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:30:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-11-09 07:30:20,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:30:20,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286392083] [2024-11-09 07:30:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286392083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:30:20,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363640688] [2024-11-09 07:30:20,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:30:20,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:30:20,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:30:20,073 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:30:20,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:30:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:30:20,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 07:30:20,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:30:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-11-09 07:30:20,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:30:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2024-11-09 07:30:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363640688] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:30:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447358752] [2024-11-09 07:30:20,326 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:30:20,326 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:30:20,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:30:20,326 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:30:20,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:30:21,011 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 07:30:21,078 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:30:49,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2397#(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_19| Int) (|v_ULTIMATE.start_main_~ret5~0#1_20| Int) (|v_ULTIMATE.start_main_~ret~1#1_19| Int)) (and (or (and (exists ((|v_#memory_int_64| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_64| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_64| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_max_~ret~0_140 Int) (v_max_~x.offset_BEFORE_RETURN_24 Int) (v_max_~x.base_BEFORE_RETURN_24 Int)) (and (or (= (mod v_max_~ret~0_140 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 4294967296)) (= (mod v_max_~ret~0_140 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_20|)) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_24) (+ v_max_~x.offset_BEFORE_RETURN_24 36)) v_max_~ret~0_140)))) (and (exists ((v_max_~ret~0_140 Int) (v_max_~x.offset_BEFORE_RETURN_23 Int) (v_max_~x.base_BEFORE_RETURN_23 Int)) (and (or (= (mod v_max_~ret~0_140 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 4294967296)) (= (mod v_max_~ret~0_140 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_20|)) (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_23) (+ v_max_~x.offset_BEFORE_RETURN_23 36)) v_max_~ret~0_140))) (exists ((|v_#memory_int_64| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_64| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_64| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483647) (<= |v_ULTIMATE.start_main_~ret~1#1_19| 2147483647) (<= |v_ULTIMATE.start_main_~ret2~0#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_20| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_19| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_19| |v_ULTIMATE.start_main_~ret~1#1_19|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_19| |v_ULTIMATE.start_main_~ret5~0#1_20|))))))' at error location [2024-11-09 07:30:49,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:30:49,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:30:49,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2024-11-09 07:30:49,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228783864] [2024-11-09 07:30:49,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:30:49,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:30:49,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:30:49,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:30:49,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=659, Unknown=24, NotChecked=0, Total=812 [2024-11-09 07:30:49,003 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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 07:30:49,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:30:49,070 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2024-11-09 07:30:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:30:49,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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 97 [2024-11-09 07:30:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:30:49,071 INFO L225 Difference]: With dead ends: 104 [2024-11-09 07:30:49,072 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 07:30:49,072 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=129, Invalid=659, Unknown=24, NotChecked=0, Total=812 [2024-11-09 07:30:49,073 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:30:49,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:30:49,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 07:30:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-09 07:30:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 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 07:30:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-11-09 07:30:49,080 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 97 [2024-11-09 07:30:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:30:49,081 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-11-09 07:30:49,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 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 07:30:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-11-09 07:30:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 07:30:49,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:30:49,083 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 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 07:30:49,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:30:49,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:30:49,284 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:30:49,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:30:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash -934020519, now seen corresponding path program 5 times [2024-11-09 07:30:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:30:49,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063906059] [2024-11-09 07:30:49,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:30:49,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:30:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:30:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2024-11-09 07:30:49,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:30:49,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063906059] [2024-11-09 07:30:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063906059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:30:49,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140204599] [2024-11-09 07:30:49,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:30:49,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:30:49,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:30:49,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:30:49,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:30:49,644 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 07:30:49,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:30:49,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 07:30:49,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:30:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 448 proven. 4 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2024-11-09 07:30:49,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:30:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2024-11-09 07:30:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140204599] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:30:49,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629000093] [2024-11-09 07:30:49,718 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:30:49,719 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:30:49,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:30:49,719 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:30:49,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:30:50,235 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 07:30:50,280 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:31:10,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3316#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~1#1_20| Int) (|v_ULTIMATE.start_main_~ret2~0#1_21| Int) (|v_ULTIMATE.start_main_~ret5~0#1_22| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483648)) (<= |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483647) (<= |v_ULTIMATE.start_main_~ret5~0#1_22| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_20| 2147483648)) (or (and (exists ((|v_#memory_int_75| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_75| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_75| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_max_~x.base_BEFORE_RETURN_29 Int) (v_max_~x.offset_BEFORE_RETURN_29 Int) (v_max_~ret~0_188 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_29) (+ v_max_~x.offset_BEFORE_RETURN_29 36)) v_max_~ret~0_188) (or (= (mod v_max_~ret~0_188 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 4294967296)) (= (mod v_max_~ret~0_188 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_22|))))) (and (exists ((|v_#memory_int_75| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_75| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_75| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_max_~x.offset_BEFORE_RETURN_30 Int) (v_max_~ret~0_188 Int) (v_max_~x.base_BEFORE_RETURN_30 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_30) (+ v_max_~x.offset_BEFORE_RETURN_30 36)) v_max_~ret~0_188) (or (= (mod v_max_~ret~0_188 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_22| 4294967296)) (= (mod v_max_~ret~0_188 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_22|)))))) (<= |v_ULTIMATE.start_main_~ret~1#1_20| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_21| 2147483648)) (or (not (= |v_ULTIMATE.start_main_~ret~1#1_20| |v_ULTIMATE.start_main_~ret5~0#1_22|)) (not (= |v_ULTIMATE.start_main_~ret2~0#1_21| |v_ULTIMATE.start_main_~ret~1#1_20|))))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 07:31:10,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:31:10,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:31:10,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-09 07:31:10,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324804537] [2024-11-09 07:31:10,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:31:10,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 07:31:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:31:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 07:31:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=524, Unknown=33, NotChecked=0, Total=650 [2024-11-09 07:31:10,216 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 07:31:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:31:10,266 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2024-11-09 07:31:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:31:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 109 [2024-11-09 07:31:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:31:10,268 INFO L225 Difference]: With dead ends: 100 [2024-11-09 07:31:10,268 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 07:31:10,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=93, Invalid=524, Unknown=33, NotChecked=0, Total=650 [2024-11-09 07:31:10,270 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:31:10,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 54 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:31:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 07:31:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-09 07:31:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 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 07:31:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2024-11-09 07:31:10,277 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 109 [2024-11-09 07:31:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:31:10,278 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2024-11-09 07:31:10,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 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 07:31:10,278 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2024-11-09 07:31:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 07:31:10,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:31:10,280 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:31:10,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:31:10,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:31:10,481 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:31:10,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:31:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash -971775891, now seen corresponding path program 6 times [2024-11-09 07:31:10,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:31:10,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040055082] [2024-11-09 07:31:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:31:10,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:31:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:31:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2024-11-09 07:31:10,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:31:10,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040055082] [2024-11-09 07:31:10,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040055082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:31:10,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170763421] [2024-11-09 07:31:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:31:10,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:31:10,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:31:10,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:31:10,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:31:10,993 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:31:10,993 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:31:10,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 07:31:10,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:31:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 448 proven. 36 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2024-11-09 07:31:11,039 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:31:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2024-11-09 07:31:11,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170763421] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:31:11,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318658969] [2024-11-09 07:31:11,143 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 07:31:11,143 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:31:11,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:31:11,145 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:31:11,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:31:11,622 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2024-11-09 07:31:11,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:31:55,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4293#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~ret~1#1_21| Int) (|v_ULTIMATE.start_main_~ret2~0#1_23| Int) (|v_ULTIMATE.start_main_~ret5~0#1_24| Int)) (and (<= |v_ULTIMATE.start_main_~ret2~0#1_23| 2147483647) (or (and (exists ((v_max_~x.offset_BEFORE_RETURN_36 Int) (v_max_~x.base_BEFORE_RETURN_36 Int) (v_max_~ret~0_236 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_36) (+ v_max_~x.offset_BEFORE_RETURN_36 36)) v_max_~ret~0_236) (or (= (mod v_max_~ret~0_236 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_24|) (= (mod v_max_~ret~0_236 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 4294967296))))) (exists ((|v_#memory_int_90| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_90| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_90| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36)))))) (and (exists ((|v_#memory_int_90| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_90| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_90| |ULTIMATE.start_main_~#x~0#1.base|) 36 (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) 36))))) (exists ((v_max_~x.offset_BEFORE_RETURN_35 Int) (v_max_~x.base_BEFORE_RETURN_35 Int) (v_max_~ret~0_236 Int)) (and (<= (select (select |#memory_int| v_max_~x.base_BEFORE_RETURN_35) (+ v_max_~x.offset_BEFORE_RETURN_35 36)) v_max_~ret~0_236) (or (= (mod v_max_~ret~0_236 4294967296) |v_ULTIMATE.start_main_~ret5~0#1_24|) (= (mod v_max_~ret~0_236 4294967296) (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 4294967296))))))) (<= 0 (+ |v_ULTIMATE.start_main_~ret2~0#1_23| 2147483648)) (<= |v_ULTIMATE.start_main_~ret~1#1_21| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_~ret5~0#1_24| 2147483648)) (<= 0 (+ |v_ULTIMATE.start_main_~ret~1#1_21| 2147483648)) (<= |v_ULTIMATE.start_main_~ret5~0#1_24| 2147483647) (or (not (= |v_ULTIMATE.start_main_~ret2~0#1_23| |v_ULTIMATE.start_main_~ret~1#1_21|)) (not (= |v_ULTIMATE.start_main_~ret~1#1_21| |v_ULTIMATE.start_main_~ret5~0#1_24|))))) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0))' at error location [2024-11-09 07:31:55,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:31:55,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:31:55,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-09 07:31:55,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903247757] [2024-11-09 07:31:55,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:31:55,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 07:31:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:31:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 07:31:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=609, Unknown=30, NotChecked=0, Total=756 [2024-11-09 07:31:55,175 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 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 07:31:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:31:55,231 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2024-11-09 07:31:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:31:55,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 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 117 [2024-11-09 07:31:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:31:55,233 INFO L225 Difference]: With dead ends: 106 [2024-11-09 07:31:55,233 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 07:31:55,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 326 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=117, Invalid=609, Unknown=30, NotChecked=0, Total=756 [2024-11-09 07:31:55,234 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:31:55,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:31:55,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 07:31:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-09 07:31:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 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 07:31:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-11-09 07:31:55,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 117 [2024-11-09 07:31:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:31:55,244 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-11-09 07:31:55,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 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 07:31:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-11-09 07:31:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 07:31:55,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:31:55,246 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:31:55,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:31:55,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55b1db09-b7fb-4037-a2c4-d62d75218673/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:31:55,447 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:31:55,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:31:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2083026396, now seen corresponding path program 7 times [2024-11-09 07:31:55,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:31:55,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456321404] [2024-11-09 07:31:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:31:55,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:32:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat