./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array25_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array25_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh --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 d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:43:08,142 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:43:08,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:43:08,213 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:43:08,214 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:43:08,237 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:43:08,238 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:43:08,238 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:43:08,239 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:43:08,240 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:43:08,240 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:43:08,241 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:43:08,241 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:43:08,242 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:43:08,242 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:43:08,243 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:43:08,243 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:43:08,244 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:43:08,244 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:43:08,245 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:43:08,245 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:43:08,248 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:43:08,249 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:43:08,250 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:43:08,250 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:43:08,250 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:43:08,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:43:08,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:43:08,251 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:43:08,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:43:08,252 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:43:08,253 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:43:08,253 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:43:08,253 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:43:08,253 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:43:08,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:43:08,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:43:08,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:43:08,254 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:43:08,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:43:08,255 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:43:08,255 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:43:08,256 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:43:08,256 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:43:08,256 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:43:08,256 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:43:08,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:43:08,257 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_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a [2023-12-02 13:43:08,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:43:08,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:43:08,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:43:08,513 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:43:08,514 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:43:08,515 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-patterns/array25_pattern.c [2023-12-02 13:43:11,247 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:43:11,421 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:43:11,421 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/sv-benchmarks/c/array-patterns/array25_pattern.c [2023-12-02 13:43:11,427 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/data/94b120b6d/67e6c92c5c1f43df8ec59a3a70da9c37/FLAG11541a949 [2023-12-02 13:43:11,439 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/data/94b120b6d/67e6c92c5c1f43df8ec59a3a70da9c37 [2023-12-02 13:43:11,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:43:11,442 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:43:11,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:43:11,443 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:43:11,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:43:11,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7024f861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11, skipping insertion in model container [2023-12-02 13:43:11,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:43:11,586 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_30f7c01e-6c54-4d52-a669-537e12750385/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2023-12-02 13:43:11,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:43:11,611 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:43:11,620 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_30f7c01e-6c54-4d52-a669-537e12750385/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2023-12-02 13:43:11,629 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:43:11,641 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:43:11,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11 WrapperNode [2023-12-02 13:43:11,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:43:11,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:43:11,642 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:43:11,642 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:43:11,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,675 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-12-02 13:43:11,675 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:43:11,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:43:11,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:43:11,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:43:11,683 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,683 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,686 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,691 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:43:11,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:43:11,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:43:11,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:43:11,701 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (1/1) ... [2023-12-02 13:43:11,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:43:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:11,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:43:11,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:43:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:43:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:43:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:43:11,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:43:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:43:11,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:43:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:43:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:43:11,823 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:43:11,824 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:43:11,963 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:43:12,045 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:43:12,046 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 13:43:12,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:43:12 BoogieIcfgContainer [2023-12-02 13:43:12,048 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:43:12,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:43:12,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:43:12,054 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:43:12,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:43:11" (1/3) ... [2023-12-02 13:43:12,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed8060e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:43:12, skipping insertion in model container [2023-12-02 13:43:12,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:43:11" (2/3) ... [2023-12-02 13:43:12,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed8060e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:43:12, skipping insertion in model container [2023-12-02 13:43:12,056 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:43:12" (3/3) ... [2023-12-02 13:43:12,057 INFO L112 eAbstractionObserver]: Analyzing ICFG array25_pattern.c [2023-12-02 13:43:12,072 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:43:12,072 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:43:12,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:43:12,118 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;@23a0b917, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:43:12,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:43:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 13:43:12,135 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:12,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 13:43:12,137 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:43:12,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 122952710, now seen corresponding path program 1 times [2023-12-02 13:43:12,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:12,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926420475] [2023-12-02 13:43:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:12,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:12,232 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:12,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486449583] [2023-12-02 13:43:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:12,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:12,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:12,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:12,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:43:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:43:12,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:43:12,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:43:12,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:43:12,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:12,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926420475] [2023-12-02 13:43:12,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:12,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486449583] [2023-12-02 13:43:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486449583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:43:12,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:43:12,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:43:12,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745179050] [2023-12-02 13:43:12,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:43:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:43:12,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:43:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:43:12,420 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:12,468 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2023-12-02 13:43:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:43:12,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 13:43:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:12,477 INFO L225 Difference]: With dead ends: 19 [2023-12-02 13:43:12,477 INFO L226 Difference]: Without dead ends: 10 [2023-12-02 13:43:12,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:43:12,485 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:12,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:43:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-02 13:43:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2023-12-02 13:43:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2023-12-02 13:43:12,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2023-12-02 13:43:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:12,519 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2023-12-02 13:43:12,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2023-12-02 13:43:12,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:43:12,520 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:12,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:12,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:43:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:12,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:43:12,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash -14083983, now seen corresponding path program 1 times [2023-12-02 13:43:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:12,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419417564] [2023-12-02 13:43:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:12,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:12,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:12,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723377485] [2023-12-02 13:43:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:12,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:12,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:12,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:43:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:43:12,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:43:12,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:43:12,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:43:12,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:12,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419417564] [2023-12-02 13:43:12,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:12,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723377485] [2023-12-02 13:43:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723377485] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:43:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:43:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:43:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122999938] [2023-12-02 13:43:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:43:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:43:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:43:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:43:12,823 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:12,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:12,856 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2023-12-02 13:43:12,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:43:12,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 13:43:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:12,857 INFO L225 Difference]: With dead ends: 18 [2023-12-02 13:43:12,857 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 13:43:12,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:43:12,859 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:12,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:43:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 13:43:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-02 13:43:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-12-02 13:43:12,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2023-12-02 13:43:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:12,864 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-12-02 13:43:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-12-02 13:43:12,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:43:12,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:12,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:12,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:43:13,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 13:43:13,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:43:13,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -152197431, now seen corresponding path program 1 times [2023-12-02 13:43:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553330172] [2023-12-02 13:43:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:13,081 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:13,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511283491] [2023-12-02 13:43:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:13,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:13,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:43:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:43:13,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:43:13,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:43:13,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:43:13,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:13,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553330172] [2023-12-02 13:43:13,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:13,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511283491] [2023-12-02 13:43:13,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511283491] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:43:13,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44987182] [2023-12-02 13:43:13,222 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 13:43:13,223 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:13,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:13,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:13,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:13,849 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:13,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [44987182] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:43:13,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:43:13,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-12-02 13:43:13,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980257886] [2023-12-02 13:43:13,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:43:13,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:43:13,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:43:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:43:13,939 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:13,989 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2023-12-02 13:43:13,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:43:13,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 13:43:13,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:13,990 INFO L225 Difference]: With dead ends: 19 [2023-12-02 13:43:13,990 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 13:43:13,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:43:13,992 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:13,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:43:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 13:43:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2023-12-02 13:43:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-12-02 13:43:14,000 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2023-12-02 13:43:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:14,000 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-12-02 13:43:14,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-12-02 13:43:14,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 13:43:14,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:14,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:14,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 13:43:14,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:14,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:43:14,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:14,202 INFO L85 PathProgramCache]: Analyzing trace with hash 154602230, now seen corresponding path program 1 times [2023-12-02 13:43:14,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:14,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32753817] [2023-12-02 13:43:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:14,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:14,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:14,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22307110] [2023-12-02 13:43:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:14,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:14,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:14,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:14,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:43:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:43:14,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:43:14,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:43:14,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:43:14,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:14,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32753817] [2023-12-02 13:43:14,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:14,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22307110] [2023-12-02 13:43:14,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22307110] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:43:14,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127152975] [2023-12-02 13:43:14,326 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:43:14,326 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:14,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:14,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:14,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:14,888 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:15,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '308#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 13:43:15,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:15,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:43:15,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-12-02 13:43:15,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975437169] [2023-12-02 13:43:15,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:15,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:43:15,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:15,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:43:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:43:15,066 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:15,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:15,111 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2023-12-02 13:43:15,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:43:15,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 13:43:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:15,113 INFO L225 Difference]: With dead ends: 24 [2023-12-02 13:43:15,113 INFO L226 Difference]: Without dead ends: 14 [2023-12-02 13:43:15,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:43:15,115 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:15,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:43:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-02 13:43:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-02 13:43:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2023-12-02 13:43:15,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2023-12-02 13:43:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:15,122 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2023-12-02 13:43:15,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2023-12-02 13:43:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:43:15,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:15,123 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:15,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:43:15,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:15,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:43:15,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1172011518, now seen corresponding path program 2 times [2023-12-02 13:43:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:15,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252213750] [2023-12-02 13:43:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:15,339 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:15,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520057969] [2023-12-02 13:43:15,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:43:15,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:15,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:15,342 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:15,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:43:15,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:43:15,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:43:15,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:43:15,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:43:15,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:43:15,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:15,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252213750] [2023-12-02 13:43:15,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:15,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520057969] [2023-12-02 13:43:15,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520057969] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:43:15,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2143047684] [2023-12-02 13:43:15,447 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:43:15,448 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:15,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:15,448 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:15,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:15,792 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:15,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '457#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (or (< 0 ~ARR_SIZE~0) (and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start_main_~row~0#1| 0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 13:43:15,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:15,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:43:15,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-12-02 13:43:15,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293911971] [2023-12-02 13:43:15,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:15,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:43:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:43:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:43:15,943 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:15,988 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2023-12-02 13:43:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:43:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 13:43:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:15,989 INFO L225 Difference]: With dead ends: 29 [2023-12-02 13:43:15,989 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 13:43:15,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:43:15,990 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:15,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:43:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 13:43:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-12-02 13:43:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-12-02 13:43:15,998 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2023-12-02 13:43:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:15,998 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-12-02 13:43:15,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-12-02 13:43:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:43:15,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:15,999 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:43:16,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:43:16,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:16,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:43:16,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:16,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1692031383, now seen corresponding path program 3 times [2023-12-02 13:43:16,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:16,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461156241] [2023-12-02 13:43:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:16,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:16,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400106717] [2023-12-02 13:43:16,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:43:16,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:16,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:16,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:16,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:43:16,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:43:16,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:43:16,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:43:16,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:43:16,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:43:16,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:43:16,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461156241] [2023-12-02 13:43:16,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:43:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400106717] [2023-12-02 13:43:16,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400106717] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:43:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442042630] [2023-12-02 13:43:16,423 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:43:16,423 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:43:16,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:43:16,423 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:43:16,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:43:16,821 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:43:17,129 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '650#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 13:43:17,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:43:17,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:43:17,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-02 13:43:17,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389110163] [2023-12-02 13:43:17,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:43:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:43:17,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:43:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:43:17,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:43:17,131 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:43:17,305 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-12-02 13:43:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:43:17,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 13:43:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:43:17,306 INFO L225 Difference]: With dead ends: 31 [2023-12-02 13:43:17,306 INFO L226 Difference]: Without dead ends: 28 [2023-12-02 13:43:17,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:43:17,308 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 45 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:43:17,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:43:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-02 13:43:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-12-02 13:43:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-02 13:43:17,319 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2023-12-02 13:43:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:43:17,319 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-02 13:43:17,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:43:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-02 13:43:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:43:17,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:43:17,320 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:43:17,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:43:17,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:43:17,526 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:43:17,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:43:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash -541327114, now seen corresponding path program 4 times [2023-12-02 13:43:17,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:43:17,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327003290] [2023-12-02 13:43:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:43:17,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:43:17,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:43:17,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403751170] [2023-12-02 13:43:17,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:43:17,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:43:17,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:43:17,544 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:43:17,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:43:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:43:17,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-02 13:43:17,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:43:17,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 13:43:17,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 13:43:18,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:43:18,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-12-02 13:43:18,117 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:43:18,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 46 [2023-12-02 13:43:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:43:18,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:43:19,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:43:19,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 51 [2023-12-02 13:43:25,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:43:25,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30335 treesize of output 25505 [2023-12-02 13:43:35,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:43:35,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 136 [2023-12-02 13:43:35,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:43:35,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2023-12-02 13:43:35,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 426 [2023-12-02 13:43:35,784 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:43:35,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1675253 treesize of output 1519678 [2023-12-02 13:46:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:46:34,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:46:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327003290] [2023-12-02 13:46:34,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:46:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403751170] [2023-12-02 13:46:34,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403751170] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:46:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783028152] [2023-12-02 13:46:34,746 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:46:34,746 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:46:34,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:46:34,747 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:46:34,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:46:35,057 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:46:35,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '924#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 13:46:35,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:46:35,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:46:35,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2023-12-02 13:46:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842004052] [2023-12-02 13:46:35,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:46:35,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-02 13:46:35,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:46:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-02 13:46:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 13:46:35,459 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:46:43,101 WARN L293 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 70 DAG size of output: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:46:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:46:57,355 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2023-12-02 13:46:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 13:46:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-02 13:46:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:46:57,357 INFO L225 Difference]: With dead ends: 82 [2023-12-02 13:46:57,358 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 13:46:57,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 13:46:57,361 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:46:57,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 46 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 13:46:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 13:46:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2023-12-02 13:46:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 49 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:46:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2023-12-02 13:46:57,387 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 21 [2023-12-02 13:46:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:46:57,387 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2023-12-02 13:46:57,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:46:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2023-12-02 13:46:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:46:57,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:46:57,388 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:46:57,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:46:57,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 13:46:57,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:46:57,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:46:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash 63867894, now seen corresponding path program 5 times [2023-12-02 13:46:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:46:57,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66402043] [2023-12-02 13:46:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:46:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:46:57,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:46:57,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214514751] [2023-12-02 13:46:57,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:46:57,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:46:57,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:46:57,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:46:57,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:46:57,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 13:46:57,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:46:57,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:46:57,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:46:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:46:57,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:46:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:46:58,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:46:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66402043] [2023-12-02 13:46:58,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:46:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214514751] [2023-12-02 13:46:58,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214514751] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:46:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25489827] [2023-12-02 13:46:58,054 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:46:58,054 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:46:58,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:46:58,054 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:46:58,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:46:58,379 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:46:58,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1367#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (or (< 0 ~ARR_SIZE~0) (and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start_main_~row~0#1| 0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 13:46:58,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:46:58,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:46:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 13:46:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796803669] [2023-12-02 13:46:58,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:46:58,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:46:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:46:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:46:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:46:58,491 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:46:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:46:59,083 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2023-12-02 13:46:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:46:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 13:46:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:46:59,085 INFO L225 Difference]: With dead ends: 92 [2023-12-02 13:46:59,085 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 13:46:59,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:46:59,086 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:46:59,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:46:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 13:46:59,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2023-12-02 13:46:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:46:59,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2023-12-02 13:46:59,111 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2023-12-02 13:46:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:46:59,111 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2023-12-02 13:46:59,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:46:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2023-12-02 13:46:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:46:59,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:46:59,112 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:46:59,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:46:59,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 13:46:59,313 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:46:59,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:46:59,313 INFO L85 PathProgramCache]: Analyzing trace with hash -699320900, now seen corresponding path program 6 times [2023-12-02 13:46:59,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:46:59,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773238272] [2023-12-02 13:46:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:46:59,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:46:59,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:46:59,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558557610] [2023-12-02 13:46:59,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:46:59,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:46:59,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:46:59,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:46:59,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:46:59,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:46:59,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:46:59,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:46:59,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:46:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:46:59,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:46:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:46:59,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:46:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773238272] [2023-12-02 13:46:59,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:46:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558557610] [2023-12-02 13:46:59,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558557610] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:46:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785811560] [2023-12-02 13:46:59,497 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:46:59,497 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:46:59,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:46:59,497 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:46:59,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:46:59,771 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:46:59,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1781#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (or (< 0 ~ARR_SIZE~0) (and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start_main_~row~0#1| 0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 13:46:59,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:46:59,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:46:59,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 13:46:59,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279129311] [2023-12-02 13:46:59,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:46:59,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:46:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:46:59,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:46:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:46:59,903 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:47:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:47:00,035 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2023-12-02 13:47:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:47:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 13:47:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:47:00,036 INFO L225 Difference]: With dead ends: 56 [2023-12-02 13:47:00,036 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 13:47:00,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:47:00,037 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:47:00,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 11 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:47:00,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 13:47:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-02 13:47:00,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:47:00,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-12-02 13:47:00,061 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2023-12-02 13:47:00,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:47:00,061 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-12-02 13:47:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:47:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-12-02 13:47:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:47:00,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:47:00,062 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:47:00,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 13:47:00,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:47:00,268 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:47:00,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:47:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash 924848582, now seen corresponding path program 7 times [2023-12-02 13:47:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:47:00,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8588441] [2023-12-02 13:47:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:47:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:47:00,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:47:00,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831060379] [2023-12-02 13:47:00,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:47:00,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:47:00,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:47:00,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:47:00,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:47:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:47:00,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:47:00,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:47:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 13:47:00,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:47:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 13:47:00,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:47:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8588441] [2023-12-02 13:47:00,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:47:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831060379] [2023-12-02 13:47:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831060379] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:47:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052119786] [2023-12-02 13:47:00,460 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:47:00,460 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:47:00,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:47:00,460 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:47:00,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:47:00,735 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:47:00,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2106#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 13:47:00,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:47:00,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:47:00,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-12-02 13:47:00,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216764965] [2023-12-02 13:47:00,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:47:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 13:47:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:47:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 13:47:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-12-02 13:47:00,807 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:47:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:47:01,010 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-12-02 13:47:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:47:01,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 13:47:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:47:01,011 INFO L225 Difference]: With dead ends: 58 [2023-12-02 13:47:01,011 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 13:47:01,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2023-12-02 13:47:01,012 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:47:01,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:47:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 13:47:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2023-12-02 13:47:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:47:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-12-02 13:47:01,048 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2023-12-02 13:47:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:47:01,048 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-12-02 13:47:01,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:47:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-12-02 13:47:01,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 13:47:01,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:47:01,049 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-12-02 13:47:01,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 13:47:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:47:01,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:47:01,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:47:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash 132371382, now seen corresponding path program 8 times [2023-12-02 13:47:01,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:47:01,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641597331] [2023-12-02 13:47:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:47:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:47:01,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:47:01,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114565392] [2023-12-02 13:47:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:47:01,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:47:01,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:47:01,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:47:01,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:47:02,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-02 13:47:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:47:02,539 WARN L260 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 137 conjunts are in the unsatisfiable core [2023-12-02 13:47:02,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:47:02,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 13:47:02,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 13:47:02,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:47:02,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-12-02 13:47:02,837 INFO L349 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2023-12-02 13:47:02,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2023-12-02 13:47:02,926 INFO L349 Elim1Store]: treesize reduction 86, result has 23.2 percent of original size [2023-12-02 13:47:02,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 53 treesize of output 63 [2023-12-02 13:47:03,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 101 [2023-12-02 13:47:03,111 INFO L349 Elim1Store]: treesize reduction 139, result has 31.9 percent of original size [2023-12-02 13:47:03,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 97 [2023-12-02 13:47:03,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 13:47:03,184 INFO L349 Elim1Store]: treesize reduction 89, result has 8.2 percent of original size [2023-12-02 13:47:03,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 45 [2023-12-02 13:47:03,547 INFO L349 Elim1Store]: treesize reduction 149, result has 21.2 percent of original size [2023-12-02 13:47:03,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 87 treesize of output 101 [2023-12-02 13:47:03,738 INFO L349 Elim1Store]: treesize reduction 169, result has 16.3 percent of original size [2023-12-02 13:47:03,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 116 [2023-12-02 13:47:03,964 INFO L349 Elim1Store]: treesize reduction 219, result has 15.4 percent of original size [2023-12-02 13:47:03,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 111 treesize of output 131 [2023-12-02 13:47:06,047 INFO L349 Elim1Store]: treesize reduction 24, result has 90.0 percent of original size [2023-12-02 13:47:06,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 253 [2023-12-02 13:47:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:47:06,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:47:08,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 27 [2023-12-02 13:47:09,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 29 [2023-12-02 13:47:10,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2023-12-02 13:47:10,694 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:47:10,695 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:47:10,696 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:47:10,698 WARN L214 Elim1Store]: Array PQE input equivalent to true [2023-12-02 13:47:10,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:47:10,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2023-12-02 13:47:10,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:47:10,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2023-12-02 13:47:10,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 212 treesize of output 186 [2023-12-02 13:47:10,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-12-02 13:47:11,043 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-12-02 13:47:11,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 24047 treesize of output 21489 [2023-12-02 13:47:11,506 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:47:11,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:47:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641597331] [2023-12-02 13:47:11,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:47:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114565392] [2023-12-02 13:47:11,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114565392] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:47:11,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [870915462] [2023-12-02 13:47:11,508 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:47:11,508 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:47:11,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:47:11,509 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:47:11,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:47:11,736 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:47:12,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2575#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|))' at error location [2023-12-02 13:47:12,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:47:12,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:47:12,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 67 [2023-12-02 13:47:12,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596255602] [2023-12-02 13:47:12,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:47:12,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-02 13:47:12,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:47:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-02 13:47:12,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=987, Invalid=4415, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 13:47:12,388 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 68 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:47:22,719 WARN L293 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 295 DAG size of output: 244 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:47:53,983 WARN L293 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 304 DAG size of output: 235 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:48:02,355 WARN L293 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 324 DAG size of output: 240 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:48:20,160 WARN L293 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 266 DAG size of output: 208 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:48:54,426 WARN L293 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 269 DAG size of output: 230 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:49:43,769 WARN L293 SmtUtils]: Spent 8.76s on a formula simplification. DAG size of input: 317 DAG size of output: 250 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:49:56,938 WARN L293 SmtUtils]: Spent 6.92s on a formula simplification. DAG size of input: 310 DAG size of output: 243 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:50:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:50:04,058 INFO L93 Difference]: Finished difference Result 170 states and 235 transitions. [2023-12-02 13:50:04,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2023-12-02 13:50:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-02 13:50:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:50:04,060 INFO L225 Difference]: With dead ends: 170 [2023-12-02 13:50:04,060 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 13:50:04,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8445 ImplicationChecksByTransitivity, 157.4s TimeCoverageRelationStatistics Valid=4651, Invalid=24079, Unknown=0, NotChecked=0, Total=28730 [2023-12-02 13:50:04,068 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 186 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:50:04,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 26 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 19.6s Time] [2023-12-02 13:50:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 13:50:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2023-12-02 13:50:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3553719008264462) internal successors, (164), 121 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 164 transitions. [2023-12-02 13:50:04,254 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 164 transitions. Word has length 35 [2023-12-02 13:50:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:50:04,254 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 164 transitions. [2023-12-02 13:50:04,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2023-12-02 13:50:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 13:50:04,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:50:04,256 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-12-02 13:50:04,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:50:04,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:50:04,457 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:50:04,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:50:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash 572544768, now seen corresponding path program 9 times [2023-12-02 13:50:04,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:50:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687977368] [2023-12-02 13:50:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:50:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:50:04,474 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:50:04,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398727099] [2023-12-02 13:50:04,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:50:04,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:50:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:50:04,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:50:04,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:50:04,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:50:04,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:50:04,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:50:04,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:50:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-02 13:50:04,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:50:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-12-02 13:50:04,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:50:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687977368] [2023-12-02 13:50:04,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:50:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398727099] [2023-12-02 13:50:04,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398727099] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:50:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532810382] [2023-12-02 13:50:04,706 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:50:04,706 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:50:04,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:50:04,707 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:50:04,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:50:04,943 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:50:05,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3575#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 13:50:05,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:50:05,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:50:05,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-02 13:50:05,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182780774] [2023-12-02 13:50:05,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:50:05,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 13:50:05,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:50:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 13:50:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:50:05,193 INFO L87 Difference]: Start difference. First operand 122 states and 164 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:05,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:50:05,791 INFO L93 Difference]: Finished difference Result 229 states and 301 transitions. [2023-12-02 13:50:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:50:05,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-12-02 13:50:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:50:05,792 INFO L225 Difference]: With dead ends: 229 [2023-12-02 13:50:05,792 INFO L226 Difference]: Without dead ends: 144 [2023-12-02 13:50:05,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2023-12-02 13:50:05,794 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 67 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:50:05,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 13 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:50:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-02 13:50:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2023-12-02 13:50:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.201834862385321) internal successors, (131), 109 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2023-12-02 13:50:05,953 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 37 [2023-12-02 13:50:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:50:05,953 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2023-12-02 13:50:05,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2023-12-02 13:50:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 13:50:05,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:50:05,955 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-12-02 13:50:05,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 13:50:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 13:50:06,156 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:50:06,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:50:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2046638936, now seen corresponding path program 10 times [2023-12-02 13:50:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:50:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511715555] [2023-12-02 13:50:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:50:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:50:06,176 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:50:06,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250664773] [2023-12-02 13:50:06,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:50:06,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:50:06,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:50:06,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:50:06,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:50:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:50:06,290 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:50:06,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:50:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-02 13:50:06,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:50:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-02 13:50:06,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:50:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511715555] [2023-12-02 13:50:06,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:50:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250664773] [2023-12-02 13:50:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250664773] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:50:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026925982] [2023-12-02 13:50:06,475 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:50:06,475 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:50:06,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:50:06,475 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:50:06,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:50:06,708 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:50:06,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4493#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 13:50:06,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:50:06,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:50:06,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-12-02 13:50:06,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857778991] [2023-12-02 13:50:06,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:50:06,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 13:50:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:50:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 13:50:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-12-02 13:50:06,970 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:50:07,554 INFO L93 Difference]: Finished difference Result 218 states and 253 transitions. [2023-12-02 13:50:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 13:50:07,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-02 13:50:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:50:07,556 INFO L225 Difference]: With dead ends: 218 [2023-12-02 13:50:07,556 INFO L226 Difference]: Without dead ends: 154 [2023-12-02 13:50:07,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 13:50:07,557 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:50:07,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:50:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-02 13:50:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 116. [2023-12-02 13:50:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.182608695652174) internal successors, (136), 115 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2023-12-02 13:50:07,723 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 38 [2023-12-02 13:50:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:50:07,724 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2023-12-02 13:50:07,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2023-12-02 13:50:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 13:50:07,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:50:07,725 INFO L195 NwaCegarLoop]: trace histogram [16, 9, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2023-12-02 13:50:07,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 13:50:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 13:50:07,926 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:50:07,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:50:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash 60072525, now seen corresponding path program 11 times [2023-12-02 13:50:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:50:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654798708] [2023-12-02 13:50:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:50:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:50:07,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:50:07,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096639891] [2023-12-02 13:50:07,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:50:07,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:50:07,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:50:07,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:50:07,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:50:08,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 13:50:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:50:08,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:50:08,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:50:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 45 proven. 70 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-12-02 13:50:08,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:50:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-12-02 13:50:08,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:50:08,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654798708] [2023-12-02 13:50:08,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:50:08,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096639891] [2023-12-02 13:50:08,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096639891] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:50:08,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [332715662] [2023-12-02 13:50:08,715 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 13:50:08,716 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:50:08,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:50:08,716 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:50:08,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:50:08,959 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:50:09,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5453#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= ~ARR_SIZE~0 |ULTIMATE.start_main_~sum~0#1|)) (not (= |ULTIMATE.start_main_~sum~0#1| 0)) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~column~0#1|) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 13:50:09,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:50:09,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:50:09,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-02 13:50:09,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684750696] [2023-12-02 13:50:09,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:50:09,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 13:50:09,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:50:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 13:50:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:50:09,213 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:50:09,986 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2023-12-02 13:50:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:50:09,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-02 13:50:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:50:09,988 INFO L225 Difference]: With dead ends: 143 [2023-12-02 13:50:09,988 INFO L226 Difference]: Without dead ends: 108 [2023-12-02 13:50:09,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:50:09,989 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:50:09,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 10 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:50:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-02 13:50:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 101. [2023-12-02 13:50:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.12) internal successors, (112), 100 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:10,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2023-12-02 13:50:10,123 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 44 [2023-12-02 13:50:10,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:50:10,123 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2023-12-02 13:50:10,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:50:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2023-12-02 13:50:10,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 13:50:10,124 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:50:10,124 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-12-02 13:50:10,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:50:10,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 13:50:10,325 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:50:10,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:50:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1641424666, now seen corresponding path program 12 times [2023-12-02 13:50:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:50:10,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15779551] [2023-12-02 13:50:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:50:10,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:50:10,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:50:10,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264384730] [2023-12-02 13:50:10,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:50:10,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:50:10,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:50:10,349 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:50:10,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30f7c01e-6c54-4d52-a669-537e12750385/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:50:13,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:50:13,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:50:13,587 WARN L260 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 200 conjunts are in the unsatisfiable core [2023-12-02 13:50:13,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:50:13,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 13:50:13,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 13:50:13,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:13,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-12-02 13:50:13,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:13,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-12-02 13:50:13,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:13,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-12-02 13:50:13,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:13,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 70 [2023-12-02 13:50:13,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:13,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2023-12-02 13:50:14,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:14,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 96 [2023-12-02 13:50:14,376 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:14,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 108 [2023-12-02 13:50:14,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:14,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 97 treesize of output 120 [2023-12-02 13:50:14,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:14,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 106 treesize of output 132 [2023-12-02 13:50:14,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:14,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 115 treesize of output 144 [2023-12-02 13:50:15,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:15,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 124 treesize of output 156 [2023-12-02 13:50:15,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:15,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 133 treesize of output 170 [2023-12-02 13:50:15,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:15,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 144 treesize of output 182 [2023-12-02 13:50:15,775 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:50:15,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 153 treesize of output 196 [2023-12-02 13:50:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:50:21,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:50:30,934 INFO L349 Elim1Store]: treesize reduction 186, result has 69.4 percent of original size [2023-12-02 13:50:30,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 231 treesize of output 461 [2023-12-02 13:50:36,337 INFO L349 Elim1Store]: treesize reduction 186, result has 69.4 percent of original size [2023-12-02 13:50:36,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 50 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 70 case distinctions, treesize of input 231 treesize of output 461