./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.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_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/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_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/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_7cb20e67-a8b5-4a05-807e-9e625780d485/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 d7b32f819b918e072cd2f6b8ef11cf08c33c51198307cb8de75af009db97bd7b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:12:11,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:12:11,277 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:12:11,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:12:11,283 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:12:11,312 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:12:11,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:12:11,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:12:11,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:12:11,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:12:11,316 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:12:11,316 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:12:11,317 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:12:11,318 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:12:11,318 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:12:11,319 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:12:11,319 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:12:11,320 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:12:11,320 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:12:11,321 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:12:11,321 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:12:11,322 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:12:11,323 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:12:11,323 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:12:11,324 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:12:11,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:12:11,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:12:11,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:12:11,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:12:11,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:12:11,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:12:11,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:12:11,327 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:12:11,327 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:12:11,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:12:11,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:12:11,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:12:11,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:12:11,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:12:11,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:12:11,329 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:12:11,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:12:11,330 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:12:11,330 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:12:11,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:12:11,331 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_7cb20e67-a8b5-4a05-807e-9e625780d485/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b32f819b918e072cd2f6b8ef11cf08c33c51198307cb8de75af009db97bd7b [2023-11-19 04:12:11,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:12:11,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:12:11,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:12:11,665 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:12:11,666 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:12:11,668 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2023-11-19 04:12:14,761 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:12:15,036 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:12:15,037 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i [2023-11-19 04:12:15,047 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/data/12815bd2e/786172b832d74f81aa00d5a1f9819036/FLAGc33fb28c3 [2023-11-19 04:12:15,388 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/data/12815bd2e/786172b832d74f81aa00d5a1f9819036 [2023-11-19 04:12:15,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:12:15,392 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:12:15,394 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:12:15,394 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:12:15,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:12:15,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134113e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15, skipping insertion in model container [2023-11-19 04:12:15,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,426 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:12:15,593 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_7cb20e67-a8b5-4a05-807e-9e625780d485/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2023-11-19 04:12:15,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:12:15,619 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:12:15,630 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_7cb20e67-a8b5-4a05-807e-9e625780d485/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound10.i[951,964] [2023-11-19 04:12:15,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:12:15,647 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:12:15,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15 WrapperNode [2023-11-19 04:12:15,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:12:15,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:12:15,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:12:15,649 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:12:15,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,677 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2023-11-19 04:12:15,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:12:15,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:12:15,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:12:15,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:12:15,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,689 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,689 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,697 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,698 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,700 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:12:15,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:12:15,701 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:12:15,701 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:12:15,702 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (1/1) ... [2023-11-19 04:12:15,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:12:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:15,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:12:15,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:12:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:12:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:12:15,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:12:15,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:12:15,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:12:15,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:12:15,874 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:12:15,877 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:12:16,093 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:12:16,135 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:12:16,135 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:12:16,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:12:16 BoogieIcfgContainer [2023-11-19 04:12:16,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:12:16,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:12:16,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:12:16,147 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:12:16,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:12:15" (1/3) ... [2023-11-19 04:12:16,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a5af86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:12:16, skipping insertion in model container [2023-11-19 04:12:16,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:12:15" (2/3) ... [2023-11-19 04:12:16,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a5af86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:12:16, skipping insertion in model container [2023-11-19 04:12:16,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:12:16" (3/3) ... [2023-11-19 04:12:16,156 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.i [2023-11-19 04:12:16,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:12:16,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:12:16,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:12:16,228 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;@d507f20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:12:16,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:12:16,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:12:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:12:16,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:16,239 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:16,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:16,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash 774102990, now seen corresponding path program 1 times [2023-11-19 04:12:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:16,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811540414] [2023-11-19 04:12:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:16,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:16,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:16,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811540414] [2023-11-19 04:12:16,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 04:12:16,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942413509] [2023-11-19 04:12:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:16,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:16,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:12:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:16,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 04:12:16,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:16,462 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:12:16,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942413509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:12:16,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:12:16,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:12:16,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310236899] [2023-11-19 04:12:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:12:16,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:12:16,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:16,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:12:16,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:12:16,502 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:16,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:16,547 INFO L93 Difference]: Finished difference Result 30 states and 43 transitions. [2023-11-19 04:12:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:12:16,553 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 04:12:16,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:16,561 INFO L225 Difference]: With dead ends: 30 [2023-11-19 04:12:16,561 INFO L226 Difference]: Without dead ends: 15 [2023-11-19 04:12:16,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:12:16,574 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:12:16,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:12:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-19 04:12:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-19 04:12:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:12:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-19 04:12:16,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2023-11-19 04:12:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:16,623 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-19 04:12:16,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-19 04:12:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:12:16,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:16,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:16,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:12:16,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 04:12:16,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:16,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1084410172, now seen corresponding path program 1 times [2023-11-19 04:12:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:16,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270678326] [2023-11-19 04:12:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:16,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:16,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270678326] [2023-11-19 04:12:16,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 04:12:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724412868] [2023-11-19 04:12:16,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:16,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:16,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:16,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:16,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:12:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:16,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:12:16,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:17,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:12:17,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724412868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:12:17,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:12:17,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:12:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042749682] [2023-11-19 04:12:17,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:12:17,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:12:17,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:17,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:12:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:12:17,042 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:17,070 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2023-11-19 04:12:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:12:17,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 04:12:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:17,071 INFO L225 Difference]: With dead ends: 28 [2023-11-19 04:12:17,072 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 04:12:17,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:12:17,074 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:12:17,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:12:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 04:12:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-19 04:12:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:12:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-19 04:12:17,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2023-11-19 04:12:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:17,126 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-19 04:12:17,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-19 04:12:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:12:17,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:17,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:17,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:12:17,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:17,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:17,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1068718015, now seen corresponding path program 1 times [2023-11-19 04:12:17,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:17,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804868553] [2023-11-19 04:12:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:17,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:17,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:12:17,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846128994] [2023-11-19 04:12:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:17,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:17,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:17,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:12:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:17,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:12:17,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:17,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:12:17,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:17,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804868553] [2023-11-19 04:12:17,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:12:17,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846128994] [2023-11-19 04:12:17,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846128994] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:12:17,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:12:17,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:12:17,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406425633] [2023-11-19 04:12:17,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:12:17,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:12:17,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:17,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:12:17,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:12:17,462 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:17,510 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-19 04:12:17,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:12:17,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 04:12:17,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:17,520 INFO L225 Difference]: With dead ends: 28 [2023-11-19 04:12:17,520 INFO L226 Difference]: Without dead ends: 21 [2023-11-19 04:12:17,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 04:12:17,524 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:12:17,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:12:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-19 04:12:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-19 04:12:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:12:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-19 04:12:17,537 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2023-11-19 04:12:17,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:17,538 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-19 04:12:17,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-19 04:12:17,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:12:17,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:17,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:17,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:12:17,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:17,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:17,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:17,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1066930555, now seen corresponding path program 1 times [2023-11-19 04:12:17,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:17,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678695297] [2023-11-19 04:12:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:17,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:12:17,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723282338] [2023-11-19 04:12:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:17,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:17,765 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:17,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:12:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:17,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:12:17,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:17,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:12:17,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678695297] [2023-11-19 04:12:17,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:12:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723282338] [2023-11-19 04:12:17,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723282338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:12:17,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:12:17,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:12:17,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398224798] [2023-11-19 04:12:17,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:12:17,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:12:17,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:17,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:12:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:12:17,900 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:17,949 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-19 04:12:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:12:17,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 04:12:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:17,951 INFO L225 Difference]: With dead ends: 31 [2023-11-19 04:12:17,951 INFO L226 Difference]: Without dead ends: 28 [2023-11-19 04:12:17,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:12:17,953 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 44 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 04:12:17,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 44 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:12:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-19 04:12:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-11-19 04:12:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:12:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-19 04:12:17,961 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2023-11-19 04:12:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:17,961 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-19 04:12:17,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:12:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-19 04:12:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:12:17,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:17,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:17,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:12:18,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:18,180 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:18,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1343356900, now seen corresponding path program 1 times [2023-11-19 04:12:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:18,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490881159] [2023-11-19 04:12:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:18,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:12:18,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414048089] [2023-11-19 04:12:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:18,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:18,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:18,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:18,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:12:18,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:18,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:12:18,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:18,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:12:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:18,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490881159] [2023-11-19 04:12:18,403 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:12:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414048089] [2023-11-19 04:12:18,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414048089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:12:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [532141173] [2023-11-19 04:12:18,427 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:12:18,433 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:12:18,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:12:18,444 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:12:18,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:12:18,956 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2023-11-19 04:12:18,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:12:19,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [532141173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:12:19,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:12:19,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 6] total 18 [2023-11-19 04:12:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629823769] [2023-11-19 04:12:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:12:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:12:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:19,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:12:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:12:19,478 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:12:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:19,619 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-11-19 04:12:19,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:12:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-19 04:12:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:19,621 INFO L225 Difference]: With dead ends: 45 [2023-11-19 04:12:19,622 INFO L226 Difference]: Without dead ends: 26 [2023-11-19 04:12:19,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:12:19,624 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:12:19,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:12:19,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-19 04:12:19,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-19 04:12:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:12:19,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-19 04:12:19,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 18 [2023-11-19 04:12:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:19,642 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-19 04:12:19,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 8 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:12:19,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-19 04:12:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:12:19,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:19,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:19,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-19 04:12:19,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:19,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:19,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:19,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1830622537, now seen corresponding path program 1 times [2023-11-19 04:12:19,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:19,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328110589] [2023-11-19 04:12:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:19,876 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:12:19,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029728726] [2023-11-19 04:12:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:19,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:19,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:19,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:19,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:12:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:19,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:12:19,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:12:19,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:12:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:12:19,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:19,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328110589] [2023-11-19 04:12:19,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:12:19,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029728726] [2023-11-19 04:12:19,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029728726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:12:19,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2141484432] [2023-11-19 04:12:19,993 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:12:19,993 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:12:19,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:12:19,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:12:19,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:12:21,223 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-19 04:12:21,228 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:12:23,650 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '733#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 04:12:23,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:12:23,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:12:23,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-11-19 04:12:23,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673375026] [2023-11-19 04:12:23,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:12:23,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:12:23,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:23,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:12:23,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:12:23,653 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:12:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:23,762 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2023-11-19 04:12:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:12:23,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-19 04:12:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:23,763 INFO L225 Difference]: With dead ends: 63 [2023-11-19 04:12:23,764 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 04:12:23,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:12:23,765 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:12:23,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 79 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:12:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 04:12:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2023-11-19 04:12:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:12:23,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-19 04:12:23,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 20 [2023-11-19 04:12:23,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:23,773 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-19 04:12:23,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:12:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-19 04:12:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:12:23,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:23,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:23,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:12:23,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:23,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:23,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1579561542, now seen corresponding path program 1 times [2023-11-19 04:12:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:23,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809736627] [2023-11-19 04:12:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:23,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:24,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:12:24,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662595941] [2023-11-19 04:12:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:24,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:24,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:24,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:24,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:12:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:24,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:12:24,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:24,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:12:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:24,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809736627] [2023-11-19 04:12:24,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:12:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662595941] [2023-11-19 04:12:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662595941] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:12:24,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1192184709] [2023-11-19 04:12:24,217 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:12:24,217 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:12:24,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:12:24,218 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:12:24,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:12:25,252 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-19 04:12:25,256 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:12:28,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1015#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 04:12:28,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:12:28,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:12:28,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-19 04:12:28,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515574189] [2023-11-19 04:12:28,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:12:28,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:12:28,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:28,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:12:28,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-11-19 04:12:28,683 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:12:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:12:28,932 INFO L93 Difference]: Finished difference Result 140 states and 161 transitions. [2023-11-19 04:12:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 04:12:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-11-19 04:12:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:12:28,936 INFO L225 Difference]: With dead ends: 140 [2023-11-19 04:12:28,936 INFO L226 Difference]: Without dead ends: 133 [2023-11-19 04:12:28,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-11-19 04:12:28,938 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:12:28,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:12:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-19 04:12:28,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 119. [2023-11-19 04:12:28,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 96 states have internal predecessors, (111), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-19 04:12:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2023-11-19 04:12:28,972 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 21 [2023-11-19 04:12:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:12:28,973 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2023-11-19 04:12:28,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:12:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2023-11-19 04:12:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:12:28,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:12:28,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:12:29,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 04:12:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:29,197 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:12:29,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:12:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1577774082, now seen corresponding path program 1 times [2023-11-19 04:12:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:12:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761978074] [2023-11-19 04:12:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:29,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:12:29,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 04:12:29,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91533024] [2023-11-19 04:12:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:12:29,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:12:29,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:12:29,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:12:29,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cb20e67-a8b5-4a05-807e-9e625780d485/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:12:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:12:29,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 04:12:29,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:12:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:12:29,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:12:41,831 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296))) (or (let ((.cse1 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648))) (let ((.cse2 (mod (+ (* 2 .cse1 |c_ULTIMATE.start_main_~q~0#1|) .cse1) 4294967296))) (< (+ 4294967295 .cse0 (* 4294967296 (div (+ (- 1) (* (- 1) .cse1) (* (- 1) .cse0) .cse2 |c_ULTIMATE.start_main_~r~0#1|) 4294967296)) .cse1) (+ .cse2 |c_ULTIMATE.start_main_~r~0#1|)))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse0)) (< (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296) (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)))) is different from true [2023-11-19 04:12:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-19 04:12:51,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:12:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761978074] [2023-11-19 04:12:51,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 04:12:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91533024] [2023-11-19 04:12:51,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91533024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:12:51,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240794948] [2023-11-19 04:12:51,922 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:12:51,922 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:12:51,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:12:51,923 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:12:51,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:12:52,800 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-11-19 04:12:52,831 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:12:56,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1527#(and (<= 2 ~counter~0) (<= ~counter~0 10) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_38| Int)) (not (= (mod (+ (* |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_38|) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_38|) 4294967296) (mod |v_ULTIMATE.start_main_~A~0#1_BEFORE_CALL_38| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-19 04:12:56,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:12:56,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:12:56,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-19 04:12:56,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081583355] [2023-11-19 04:12:56,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:12:56,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 04:12:56,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:12:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 04:12:56,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=1, NotChecked=46, Total=650 [2023-11-19 04:12:56,639 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:13:07,808 WARN L293 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)