./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ --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 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:19,244 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:19,391 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:58:19,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:19,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:19,443 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:19,444 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:19,445 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:19,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:19,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:19,452 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:19,452 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:19,453 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:19,454 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:19,455 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:19,455 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:19,456 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:19,456 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:19,457 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:19,457 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:19,457 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:19,458 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:19,459 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:19,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:19,459 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:58:19,460 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:19,460 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:58:19,461 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:19,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:19,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:19,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:19,463 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:58:19,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:19,463 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:19,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:19,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:19,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:19,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:19,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:19,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:19,465 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:19,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:19,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:19,466 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:19,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:19,466 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_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e48915cf0eaefe43320bbe59bf88f5c68b2f305d293e808fa6ece9112b5c238 [2023-11-19 04:58:19,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:19,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:19,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:19,746 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:19,747 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:19,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/reducercommutativity/max05-1.i [2023-11-19 04:58:22,890 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:23,186 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:23,187 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/sv-benchmarks/c/reducercommutativity/max05-1.i [2023-11-19 04:58:23,198 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/data/e8f078f05/e4b1d26985af434ab9db56f2cbce5431/FLAGba4cad62a [2023-11-19 04:58:23,217 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/data/e8f078f05/e4b1d26985af434ab9db56f2cbce5431 [2023-11-19 04:58:23,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:23,226 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:23,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:23,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:23,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:23,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565139d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23, skipping insertion in model container [2023-11-19 04:58:23,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,273 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:23,495 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2023-11-19 04:58:23,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:23,521 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:23,562 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/sv-benchmarks/c/reducercommutativity/max05-1.i[1284,1297] [2023-11-19 04:58:23,563 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:23,580 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:23,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23 WrapperNode [2023-11-19 04:58:23,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:23,582 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:23,582 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:23,582 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:23,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,636 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-11-19 04:58:23,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:23,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:23,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:23,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:23,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,671 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,674 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,675 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:23,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:23,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:23,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:23,684 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (1/1) ... [2023-11-19 04:58:23,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:23,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:23,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:23,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:23,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-11-19 04:58:23,761 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-11-19 04:58:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:58:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:58:23,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:58:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:23,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:58:23,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:58:23,848 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:23,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:24,035 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:24,116 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:24,117 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 04:58:24,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:24 BoogieIcfgContainer [2023-11-19 04:58:24,122 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:24,125 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:24,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:24,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:24,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:23" (1/3) ... [2023-11-19 04:58:24,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51aa01b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:24, skipping insertion in model container [2023-11-19 04:58:24,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:23" (2/3) ... [2023-11-19 04:58:24,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51aa01b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:24, skipping insertion in model container [2023-11-19 04:58:24,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:24" (3/3) ... [2023-11-19 04:58:24,133 INFO L112 eAbstractionObserver]: Analyzing ICFG max05-1.i [2023-11-19 04:58:24,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:24,152 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:58:24,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:24,212 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e00b44a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:24,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:58:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-11-19 04:58:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:58:24,225 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:24,226 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:24,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:24,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1666910920, now seen corresponding path program 1 times [2023-11-19 04:58:24,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:24,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488197776] [2023-11-19 04:58:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 04:58:24,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:24,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488197776] [2023-11-19 04:58:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488197776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:24,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:24,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:58:24,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886340103] [2023-11-19 04:58:24,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:24,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:24,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:24,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:24,663 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-19 04:58:24,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:24,731 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-19 04:58:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 20 [2023-11-19 04:58:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:24,742 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:58:24,742 INFO L226 Difference]: Without dead ends: 16 [2023-11-19 04:58:24,745 INFO L412 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 [2023-11-19 04:58:24,751 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:24,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-19 04:58:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-19 04:58:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2023-11-19 04:58:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-19 04:58:24,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2023-11-19 04:58:24,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:24,805 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-19 04:58:24,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-19 04:58:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-19 04:58:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:58:24,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:24,807 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:24,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:58:24,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:24,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1460589963, now seen corresponding path program 1 times [2023-11-19 04:58:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:24,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448986421] [2023-11-19 04:58:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:24,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 04:58:25,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:25,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448986421] [2023-11-19 04:58:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448986421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:25,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558628726] [2023-11-19 04:58:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:25,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:25,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:25,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:25,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:58:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:25,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:25,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:58:25,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558628726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:25,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:25,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:58:25,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140821465] [2023-11-19 04:58:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:25,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:25,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:25,259 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-19 04:58:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:25,280 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-19 04:58:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:25,281 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), 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 21 [2023-11-19 04:58:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:25,282 INFO L225 Difference]: With dead ends: 29 [2023-11-19 04:58:25,282 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 04:58:25,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:25,285 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:25,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 04:58:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 04:58:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-11-19 04:58:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-19 04:58:25,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2023-11-19 04:58:25,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:25,292 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-19 04:58:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-11-19 04:58:25,293 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-19 04:58:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:58:25,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:25,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:25,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:25,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:25,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:25,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1786644812, now seen corresponding path program 1 times [2023-11-19 04:58:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:25,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817397412] [2023-11-19 04:58:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 04:58:25,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:25,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817397412] [2023-11-19 04:58:25,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817397412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:25,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806593964] [2023-11-19 04:58:25,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:25,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:25,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:25,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:25,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:58:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:25,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:58:25,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:58:25,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:25,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806593964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:25,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:25,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:58:25,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161959124] [2023-11-19 04:58:25,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:25,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:25,796 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-19 04:58:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:25,821 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-19 04:58:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:25,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 24 [2023-11-19 04:58:25,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:25,823 INFO L225 Difference]: With dead ends: 27 [2023-11-19 04:58:25,823 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 04:58:25,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:25,825 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:25,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:25,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 04:58:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 04:58:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2023-11-19 04:58:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-19 04:58:25,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2023-11-19 04:58:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:25,838 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-19 04:58:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-19 04:58:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-19 04:58:25,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 04:58:25,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:25,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:25,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:26,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:26,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:26,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash 628768764, now seen corresponding path program 1 times [2023-11-19 04:58:26,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:26,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777164600] [2023-11-19 04:58:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 04:58:26,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:26,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777164600] [2023-11-19 04:58:26,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777164600] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144452700] [2023-11-19 04:58:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:26,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:26,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:26,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:58:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:26,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:58:26,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 04:58:26,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-19 04:58:26,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144452700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:26,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19562049] [2023-11-19 04:58:26,338 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:58:26,338 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:26,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:26,348 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:26,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:27,110 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2023-11-19 04:58:27,183 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:27,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '522#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-11-19 04:58:27,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:27,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-11-19 04:58:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857604810] [2023-11-19 04:58:27,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-11-19 04:58:27,615 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-11-19 04:58:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:27,662 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-11-19 04:58:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:58:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 25 [2023-11-19 04:58:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,665 INFO L225 Difference]: With dead ends: 36 [2023-11-19 04:58:27,665 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 04:58:27,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-11-19 04:58:27,669 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 04:58:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-19 04:58:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-11-19 04:58:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-19 04:58:27,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-11-19 04:58:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,683 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-19 04:58:27,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2023-11-19 04:58:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-19 04:58:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:58:27,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,685 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:27,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 04:58:27,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:27,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:27,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1238162929, now seen corresponding path program 2 times [2023-11-19 04:58:27,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019351721] [2023-11-19 04:58:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 04:58:28,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:28,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019351721] [2023-11-19 04:58:28,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019351721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:28,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106294710] [2023-11-19 04:58:28,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:58:28,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:28,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:28,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:58:28,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 04:58:28,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:28,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:58:28,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 04:58:28,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 04:58:28,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106294710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:28,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787013054] [2023-11-19 04:58:28,241 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:58:28,241 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:28,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:28,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:28,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:28,687 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2023-11-19 04:58:28,758 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:29,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '793#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-11-19 04:58:29,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:29,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:29,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-19 04:58:29,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218036351] [2023-11-19 04:58:29,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-11-19 04:58:29,124 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-11-19 04:58:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:29,174 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-19 04:58:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:58:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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 28 [2023-11-19 04:58:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:29,177 INFO L225 Difference]: With dead ends: 38 [2023-11-19 04:58:29,177 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 04:58:29,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-11-19 04:58:29,179 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:29,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 04:58:29,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-19 04:58:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-11-19 04:58:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-19 04:58:29,193 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-11-19 04:58:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:29,193 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-19 04:58:29,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 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) [2023-11-19 04:58:29,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-19 04:58:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 04:58:29,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:29,197 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:29,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:29,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:29,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:29,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1859474266, now seen corresponding path program 3 times [2023-11-19 04:58:29,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:29,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402396609] [2023-11-19 04:58:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:29,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-11-19 04:58:29,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:29,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402396609] [2023-11-19 04:58:29,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402396609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:29,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129524547] [2023-11-19 04:58:29,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:58:29,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:29,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:29,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:29,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:58:29,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:58:29,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:29,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:58:29,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-19 04:58:29,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-19 04:58:29,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129524547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:29,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499160991] [2023-11-19 04:58:29,810 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:58:29,811 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:29,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:29,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:29,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:30,162 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2023-11-19 04:58:30,231 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:30,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1130#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-11-19 04:58:30,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:30,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:30,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2023-11-19 04:58:30,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256914603] [2023-11-19 04:58:30,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:30,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:58:30,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:58:30,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=304, Unknown=9, NotChecked=0, Total=380 [2023-11-19 04:58:30,630 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2023-11-19 04:58:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:30,676 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-11-19 04:58:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:58:30,676 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 37 [2023-11-19 04:58:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:30,677 INFO L225 Difference]: With dead ends: 43 [2023-11-19 04:58:30,677 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:58:30,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=304, Unknown=9, NotChecked=0, Total=380 [2023-11-19 04:58:30,680 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:30,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:58:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 04:58:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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) [2023-11-19 04:58:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-19 04:58:30,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 37 [2023-11-19 04:58:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:30,694 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-19 04:58:30,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2023-11-19 04:58:30,695 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-19 04:58:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 04:58:30,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:30,697 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:30,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:30,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:30,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1203426495, now seen corresponding path program 4 times [2023-11-19 04:58:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:30,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885890833] [2023-11-19 04:58:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-19 04:58:31,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:31,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885890833] [2023-11-19 04:58:31,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885890833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:31,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976388388] [2023-11-19 04:58:31,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:58:31,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:31,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:31,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:31,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:58:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:31,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:58:31,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-19 04:58:31,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-11-19 04:58:31,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976388388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:31,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837196165] [2023-11-19 04:58:31,298 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:58:31,298 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:31,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:31,299 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:31,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:31,648 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2023-11-19 04:58:31,699 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:32,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1504#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-11-19 04:58:32,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:32,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:32,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 8 [2023-11-19 04:58:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862806459] [2023-11-19 04:58:32,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:58:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:58:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=264, Unknown=9, NotChecked=0, Total=342 [2023-11-19 04:58:32,018 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2023-11-19 04:58:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:32,050 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2023-11-19 04:58:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:58:32,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 41 [2023-11-19 04:58:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:32,052 INFO L225 Difference]: With dead ends: 47 [2023-11-19 04:58:32,052 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 04:58:32,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=264, Unknown=9, NotChecked=0, Total=342 [2023-11-19 04:58:32,054 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:32,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 04:58:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 04:58:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2023-11-19 04:58:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-19 04:58:32,065 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 41 [2023-11-19 04:58:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:32,066 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-19 04:58:32,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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) [2023-11-19 04:58:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-19 04:58:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 04:58:32,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:32,069 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:32,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:32,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:32,285 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:32,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 107448756, now seen corresponding path program 5 times [2023-11-19 04:58:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455504412] [2023-11-19 04:58:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:32,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-19 04:58:32,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:32,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455504412] [2023-11-19 04:58:32,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455504412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:32,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705757238] [2023-11-19 04:58:32,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:58:32,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:32,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:32,467 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:32,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:58:32,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:58:32,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:32,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:58:32,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-11-19 04:58:32,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2023-11-19 04:58:32,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705757238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:32,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131522766] [2023-11-19 04:58:32,631 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:58:32,631 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:32,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:32,632 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:32,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:32,931 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 10 for LOIs [2023-11-19 04:58:32,981 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:33,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1893#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-11-19 04:58:33,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:33,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:33,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-19 04:58:33,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099252912] [2023-11-19 04:58:33,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:33,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:33,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-11-19 04:58:33,281 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2023-11-19 04:58:33,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:33,308 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-19 04:58:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:58:33,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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 42 [2023-11-19 04:58:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:33,309 INFO L225 Difference]: With dead ends: 42 [2023-11-19 04:58:33,309 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 04:58:33,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=235, Unknown=9, NotChecked=0, Total=306 [2023-11-19 04:58:33,310 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:33,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 04:58:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-19 04:58:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2023-11-19 04:58:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-19 04:58:33,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 42 [2023-11-19 04:58:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:33,316 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-19 04:58:33,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 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) [2023-11-19 04:58:33,317 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-19 04:58:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:58:33,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:33,318 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:33,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:33,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5337f9e-3bf4-42e8-8127-8bb37ec8f099/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:33,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:33,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash 954172084, now seen corresponding path program 6 times [2023-11-19 04:58:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:33,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346342884] [2023-11-19 04:58:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat