./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array24_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_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/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_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array24_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/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_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/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 b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:13:58,804 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:13:58,864 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:13:58,868 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:13:58,869 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:13:58,889 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:13:58,890 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:13:58,890 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:13:58,891 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:13:58,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:13:58,892 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:13:58,893 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:13:58,893 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:13:58,894 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:13:58,894 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:13:58,895 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:13:58,895 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:13:58,896 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:13:58,896 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:13:58,897 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:13:58,897 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:13:58,898 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:13:58,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:13:58,899 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:13:58,900 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:13:58,900 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:13:58,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:13:58,901 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:13:58,901 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:13:58,902 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:13:58,902 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:13:58,903 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:13:58,903 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:13:58,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:13:58,904 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:13:58,904 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:13:58,904 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:13:58,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:13:58,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:13:58,905 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:13:58,905 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:13:58,905 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:13:58,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:13:58,906 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:13:58,906 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:13:58,906 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:13:58,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:13:58,907 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_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b41c571dabcbc4670dde65107f8da5b879f13435b678b4e9a9cdcc7ef0066cf6 [2023-12-02 17:13:59,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:13:59,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:13:59,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:13:59,131 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:13:59,132 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:13:59,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-patterns/array24_pattern.c [2023-12-02 17:14:01,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:14:02,072 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:14:02,073 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/sv-benchmarks/c/array-patterns/array24_pattern.c [2023-12-02 17:14:02,079 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/data/7f00b1c57/e22c67ab175a41f1b1c35439a4494859/FLAGc7c57b16e [2023-12-02 17:14:02,094 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/data/7f00b1c57/e22c67ab175a41f1b1c35439a4494859 [2023-12-02 17:14:02,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:14:02,098 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:14:02,099 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:14:02,099 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:14:02,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:14:02,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f05f8dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02, skipping insertion in model container [2023-12-02 17:14:02,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,131 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:14:02,277 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_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2023-12-02 17:14:02,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:14:02,307 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:14:02,320 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_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/sv-benchmarks/c/array-patterns/array24_pattern.c[1359,1372] [2023-12-02 17:14:02,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:14:02,346 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:14:02,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02 WrapperNode [2023-12-02 17:14:02,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:14:02,348 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:14:02,348 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:14:02,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:14:02,356 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,364 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,386 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2023-12-02 17:14:02,386 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:14:02,387 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:14:02,387 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:14:02,387 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:14:02,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,400 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,405 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:14:02,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:14:02,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:14:02,416 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:14:02,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (1/1) ... [2023-12-02 17:14:02,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:14:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:02,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:14:02,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:14:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-12-02 17:14:02,482 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-12-02 17:14:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:14:02,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:14:02,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:14:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:14:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:14:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:14:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:14:02,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:14:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:14:02,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:14:02,566 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:14:02,568 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:14:02,750 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:14:02,812 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:14:02,813 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-02 17:14:02,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:14:02 BoogieIcfgContainer [2023-12-02 17:14:02,814 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:14:02,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:14:02,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:14:02,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:14:02,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:14:02" (1/3) ... [2023-12-02 17:14:02,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26af58d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:14:02, skipping insertion in model container [2023-12-02 17:14:02,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:14:02" (2/3) ... [2023-12-02 17:14:02,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26af58d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:14:02, skipping insertion in model container [2023-12-02 17:14:02,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:14:02" (3/3) ... [2023-12-02 17:14:02,823 INFO L112 eAbstractionObserver]: Analyzing ICFG array24_pattern.c [2023-12-02 17:14:02,837 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:14:02,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:14:02,893 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:14:02,899 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;@1829a5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:14:02,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:14:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:14:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 17:14:02,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:14:02,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:14:02,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:14:02,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:14:02,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1351545904, now seen corresponding path program 1 times [2023-12-02 17:14:02,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:14:02,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684814915] [2023-12-02 17:14:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:02,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:14:03,013 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:14:03,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275285244] [2023-12-02 17:14:03,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:03,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:03,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:14:03,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:14:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:14:03,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 17:14:03,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:14:03,123 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 17:14:03,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:14:03,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:14:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684814915] [2023-12-02 17:14:03,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:14:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275285244] [2023-12-02 17:14:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275285244] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:14:03,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:14:03,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:14:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990001627] [2023-12-02 17:14:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:14:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 17:14:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:14:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 17:14:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:14:03,160 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:14:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:14:03,197 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-12-02 17:14:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 17:14:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 17:14:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:14:03,206 INFO L225 Difference]: With dead ends: 35 [2023-12-02 17:14:03,206 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 17:14:03,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 17:14:03,211 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:14:03,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:14:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 17:14:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-12-02 17:14:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:14:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-12-02 17:14:03,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 11 [2023-12-02 17:14:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:14:03,244 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-12-02 17:14:03,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 17:14:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-12-02 17:14:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 17:14:03,246 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:14:03,246 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:14:03,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:14:03,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 17:14:03,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:14:03,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:14:03,448 INFO L85 PathProgramCache]: Analyzing trace with hash -302271629, now seen corresponding path program 1 times [2023-12-02 17:14:03,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:14:03,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000037429] [2023-12-02 17:14:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:03,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:14:03,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:14:03,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588913249] [2023-12-02 17:14:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:03,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:03,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:03,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:14:03,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:14:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:14:03,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:14:03,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:14:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:14:03,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:14:03,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:14:03,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000037429] [2023-12-02 17:14:03,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:14:03,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588913249] [2023-12-02 17:14:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588913249] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:14:03,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:14:03,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:14:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468655409] [2023-12-02 17:14:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:14:03,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:14:03,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:14:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:14:03,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:14:03,608 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:14:03,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:14:03,695 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2023-12-02 17:14:03,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:14:03,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-12-02 17:14:03,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:14:03,697 INFO L225 Difference]: With dead ends: 51 [2023-12-02 17:14:03,697 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 17:14:03,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:14:03,699 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:14:03,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:14:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 17:14:03,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-02 17:14:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:14:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-12-02 17:14:03,708 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 24 [2023-12-02 17:14:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:14:03,709 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-12-02 17:14:03,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:14:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-12-02 17:14:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:14:03,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:14:03,710 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:14:03,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:14:03,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:03,913 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:14:03,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:14:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1783846891, now seen corresponding path program 1 times [2023-12-02 17:14:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:14:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148373335] [2023-12-02 17:14:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:03,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:14:03,926 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:14:03,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726201467] [2023-12-02 17:14:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:03,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:03,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:03,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:14:03,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:14:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:14:04,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:14:04,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:14:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:14:04,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:14:04,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:14:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148373335] [2023-12-02 17:14:04,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:14:04,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726201467] [2023-12-02 17:14:04,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726201467] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:14:04,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:14:04,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:14:04,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50098341] [2023-12-02 17:14:04,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:14:04,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:14:04,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:14:04,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:14:04,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:14:04,036 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:14:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:14:04,086 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-12-02 17:14:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:14:04,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-12-02 17:14:04,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:14:04,088 INFO L225 Difference]: With dead ends: 54 [2023-12-02 17:14:04,088 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 17:14:04,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:14:04,090 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:14:04,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 44 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:14:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 17:14:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 17:14:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:14:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-12-02 17:14:04,100 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2023-12-02 17:14:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:14:04,100 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-12-02 17:14:04,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:14:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-12-02 17:14:04,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 17:14:04,101 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:14:04,102 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:14:04,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:14:04,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:04,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:14:04,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:14:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1611923139, now seen corresponding path program 1 times [2023-12-02 17:14:04,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:14:04,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487992642] [2023-12-02 17:14:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:04,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:14:04,323 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:14:04,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030432908] [2023-12-02 17:14:04,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:04,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:04,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:04,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:14:04,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:14:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:14:04,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:14:04,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:14:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:14:04,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:14:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:14:04,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:14:04,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487992642] [2023-12-02 17:14:04,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:14:04,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030432908] [2023-12-02 17:14:04,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030432908] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:14:04,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767506616] [2023-12-02 17:14:04,543 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:14:04,543 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:14:04,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:14:04,550 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:14:04,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:14:05,799 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:14:05,801 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:14:05,808 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:14:07,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '746#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:14:07,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:14:07,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:14:07,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-02 17:14:07,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659904253] [2023-12-02 17:14:07,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:14:07,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:14:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:14:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:14:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:14:07,152 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 17:14:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:14:07,267 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2023-12-02 17:14:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:14:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 30 [2023-12-02 17:14:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:14:07,269 INFO L225 Difference]: With dead ends: 58 [2023-12-02 17:14:07,269 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 17:14:07,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:14:07,271 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:14:07,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 71 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:14:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 17:14:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-02 17:14:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:14:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-12-02 17:14:07,278 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2023-12-02 17:14:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:14:07,279 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-12-02 17:14:07,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 17:14:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-12-02 17:14:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:14:07,280 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:14:07,280 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:14:07,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:14:07,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:07,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:14:07,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:14:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1661285675, now seen corresponding path program 2 times [2023-12-02 17:14:07,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:14:07,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52230390] [2023-12-02 17:14:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:14:07,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:14:07,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836217532] [2023-12-02 17:14:07,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:14:07,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:07,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:07,496 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:14:07,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:14:07,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:14:07,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:14:07,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:14:07,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:14:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:14:07,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:14:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 17:14:07,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:14:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52230390] [2023-12-02 17:14:07,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:14:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836217532] [2023-12-02 17:14:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836217532] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:14:07,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181991165] [2023-12-02 17:14:07,699 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:14:07,699 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:14:07,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:14:07,699 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:14:07,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:14:08,533 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:14:08,535 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:14:08,540 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:14:09,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1107#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |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 17:14:09,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:14:09,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:14:09,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-02 17:14:09,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219939533] [2023-12-02 17:14:09,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:14:09,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:14:09,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:14:09,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:14:09,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:14:09,524 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 17:14:09,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:14:09,613 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-12-02 17:14:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:14:09,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 32 [2023-12-02 17:14:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:14:09,614 INFO L225 Difference]: With dead ends: 70 [2023-12-02 17:14:09,614 INFO L226 Difference]: Without dead ends: 47 [2023-12-02 17:14:09,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:14:09,616 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:14:09,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:14:09,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-02 17:14:09,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-12-02 17:14:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:14:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-12-02 17:14:09,625 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 32 [2023-12-02 17:14:09,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:14:09,626 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-12-02 17:14:09,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.142857142857143) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 17:14:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-12-02 17:14:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 17:14:09,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:14:09,627 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:14:09,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:14:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:09,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:14:09,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:14:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2043806007, now seen corresponding path program 3 times [2023-12-02 17:14:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:14:09,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55955723] [2023-12-02 17:14:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:14:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:14:09,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:14:09,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161499069] [2023-12-02 17:14:09,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:14:09,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:14:09,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:14:09,842 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:14:09,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:14:10,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:14:10,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:14:10,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-02 17:14:10,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:14:10,168 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 17:14:10,192 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 17:14:10,328 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-12-02 17:14:10,329 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 3 case distinctions, treesize of input 34 treesize of output 36 [2023-12-02 17:14:10,412 INFO L349 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2023-12-02 17:14:10,413 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 5 case distinctions, treesize of input 48 treesize of output 53 [2023-12-02 17:14:12,901 INFO L349 Elim1Store]: treesize reduction 873, result has 9.1 percent of original size [2023-12-02 17:14:12,901 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 44 case distinctions, treesize of input 120 treesize of output 127 [2023-12-02 17:14:13,552 INFO L349 Elim1Store]: treesize reduction 114, result has 5.8 percent of original size [2023-12-02 17:14:13,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 66 treesize of output 24 [2023-12-02 17:14:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:14:13,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:14:20,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 218 treesize of output 210 [2023-12-02 17:14:20,497 INFO L349 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2023-12-02 17:14:20,498 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 1931296 treesize of output 1853480 [2023-12-02 17:14:27,094 WARN L293 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 356 DAG size of output: 474 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 17:14:35,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 212 treesize of output 204 [2023-12-02 17:14:35,369 INFO L349 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2023-12-02 17:14:35,370 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 1717858 treesize of output 1640042 [2023-12-02 17:14:43,465 WARN L293 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 351 DAG size of output: 289 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 17:15:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:15:11,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:15:11,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55955723] [2023-12-02 17:15:11,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:15:11,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161499069] [2023-12-02 17:15:11,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161499069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:15:11,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118850724] [2023-12-02 17:15:11,555 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:15:11,555 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:15:11,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:15:11,555 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:15:11,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:15:12,157 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:15:12,158 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:15:12,162 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:15:16,362 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1596#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |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 17:15:16,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:15:16,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:15:16,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-12-02 17:15:16,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797522294] [2023-12-02 17:15:16,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:15:16,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-02 17:15:16,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:15:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-02 17:15:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=4020, Unknown=0, NotChecked=0, Total=4556 [2023-12-02 17:15:16,367 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 47 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 47 states have internal predecessors, (62), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 17:15:26,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:15:46,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-02 17:15:52,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-02 17:15:54,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-02 17:16:11,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-02 17:16:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:11,466 INFO L93 Difference]: Finished difference Result 149 states and 196 transitions. [2023-12-02 17:16:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-02 17:16:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 47 states have internal predecessors, (62), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 40 [2023-12-02 17:16:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:11,470 INFO L225 Difference]: With dead ends: 149 [2023-12-02 17:16:11,470 INFO L226 Difference]: Without dead ends: 145 [2023-12-02 17:16:11,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5339 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=1979, Invalid=12540, Unknown=1, NotChecked=0, Total=14520 [2023-12-02 17:16:11,476 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 271 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 188 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:11,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 375 Invalid, 1375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1184 Invalid, 3 Unknown, 0 Unchecked, 21.6s Time] [2023-12-02 17:16:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-12-02 17:16:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2023-12-02 17:16:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 74 states have internal predecessors, (94), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 17:16:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 126 transitions. [2023-12-02 17:16:11,559 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 126 transitions. Word has length 40 [2023-12-02 17:16:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:11,559 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 126 transitions. [2023-12-02 17:16:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 47 states have internal predecessors, (62), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 17:16:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 126 transitions. [2023-12-02 17:16:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 17:16:11,561 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:11,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:11,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:16:11,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:11,761 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:11,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1506403109, now seen corresponding path program 1 times [2023-12-02 17:16:11,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:11,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422660737] [2023-12-02 17:16:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:11,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:11,771 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:11,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370147182] [2023-12-02 17:16:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:11,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:11,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:11,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:11,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:16:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:11,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:16:11,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 17:16:11,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 17:16:12,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:12,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422660737] [2023-12-02 17:16:12,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:12,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370147182] [2023-12-02 17:16:12,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370147182] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:12,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71108526] [2023-12-02 17:16:12,227 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:16:12,227 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:12,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:12,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:12,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:13,168 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:13,169 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-12-02 17:16:13,173 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:14,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2408#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:16:14,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:14,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:14,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-12-02 17:16:14,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304045542] [2023-12-02 17:16:14,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:14,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:16:14,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:16:14,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:16:14,777 INFO L87 Difference]: Start difference. First operand 96 states and 126 transitions. Second operand has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 17:16:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:15,355 INFO L93 Difference]: Finished difference Result 215 states and 278 transitions. [2023-12-02 17:16:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 17:16:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 44 [2023-12-02 17:16:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:15,359 INFO L225 Difference]: With dead ends: 215 [2023-12-02 17:16:15,359 INFO L226 Difference]: Without dead ends: 173 [2023-12-02 17:16:15,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 17:16:15,362 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 119 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:15,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 116 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:16:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-12-02 17:16:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 123. [2023-12-02 17:16:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.2947368421052632) internal successors, (123), 96 states have internal predecessors, (123), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-02 17:16:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2023-12-02 17:16:15,485 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 44 [2023-12-02 17:16:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:15,486 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2023-12-02 17:16:15,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 17 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 17:16:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2023-12-02 17:16:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 17:16:15,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:15,488 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:15,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 17:16:15,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:15,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:15,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash 356741945, now seen corresponding path program 4 times [2023-12-02 17:16:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:15,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537990173] [2023-12-02 17:16:15,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:15,702 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:15,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784124772] [2023-12-02 17:16:15,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:16:15,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:15,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:15,703 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:15,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:16:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:15,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:16:15,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:16:15,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 17:16:15,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:15,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537990173] [2023-12-02 17:16:15,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:15,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784124772] [2023-12-02 17:16:15,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784124772] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:15,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [645293085] [2023-12-02 17:16:15,905 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:16:15,905 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:15,905 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:15,906 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:15,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:16,564 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:16,566 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:16:16,571 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:17,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3291#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:16:17,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:17,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:17,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 17:16:17,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657732394] [2023-12-02 17:16:17,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:16:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:16:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:16:17,658 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:18,037 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2023-12-02 17:16:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:16:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2023-12-02 17:16:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:18,039 INFO L225 Difference]: With dead ends: 168 [2023-12-02 17:16:18,039 INFO L226 Difference]: Without dead ends: 139 [2023-12-02 17:16:18,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 17:16:18,040 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:18,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 91 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:16:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-02 17:16:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2023-12-02 17:16:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.28125) internal successors, (123), 97 states have internal predecessors, (123), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 17:16:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 153 transitions. [2023-12-02 17:16:18,153 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 153 transitions. Word has length 44 [2023-12-02 17:16:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:18,153 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 153 transitions. [2023-12-02 17:16:18,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 153 transitions. [2023-12-02 17:16:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 17:16:18,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:18,155 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:18,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:16:18,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:18,356 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:18,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:18,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1089485189, now seen corresponding path program 2 times [2023-12-02 17:16:18,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:18,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812145496] [2023-12-02 17:16:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:18,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:18,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909200451] [2023-12-02 17:16:18,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:16:18,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:18,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:18,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:16:18,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:16:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:16:18,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:16:18,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-02 17:16:18,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:16:18,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812145496] [2023-12-02 17:16:18,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909200451] [2023-12-02 17:16:18,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909200451] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:18,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1308734860] [2023-12-02 17:16:18,928 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:16:18,928 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:18,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:18,928 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:18,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:19,769 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:19,771 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-12-02 17:16:19,774 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:21,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4122#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:16:21,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:21,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:21,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2023-12-02 17:16:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035309304] [2023-12-02 17:16:21,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:16:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:16:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 17:16:21,378 INFO L87 Difference]: Start difference. First operand 119 states and 153 transitions. Second operand has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 21 states have internal predecessors, (45), 5 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 17:16:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:21,973 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2023-12-02 17:16:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 17:16:21,974 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 21 states have internal predecessors, (45), 5 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 46 [2023-12-02 17:16:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:21,975 INFO L225 Difference]: With dead ends: 161 [2023-12-02 17:16:21,975 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 17:16:21,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=494, Invalid=3412, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 17:16:21,977 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:21,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 124 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:16:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 17:16:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2023-12-02 17:16:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 116 states have (on average 1.2758620689655173) internal successors, (148), 117 states have internal predecessors, (148), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-02 17:16:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 184 transitions. [2023-12-02 17:16:22,083 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 184 transitions. Word has length 46 [2023-12-02 17:16:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:22,084 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 184 transitions. [2023-12-02 17:16:22,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 21 states have internal predecessors, (45), 5 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 17:16:22,084 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 184 transitions. [2023-12-02 17:16:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 17:16:22,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:22,085 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:22,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:16:22,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:22,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:22,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1828332382, now seen corresponding path program 5 times [2023-12-02 17:16:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:22,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357729369] [2023-12-02 17:16:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:22,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:22,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919652754] [2023-12-02 17:16:22,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:16:22,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:22,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:22,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:16:22,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 17:16:22,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:16:22,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:16:22,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:16:22,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:16:22,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357729369] [2023-12-02 17:16:22,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:22,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919652754] [2023-12-02 17:16:22,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919652754] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414780514] [2023-12-02 17:16:22,899 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:16:22,900 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:22,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:22,900 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:22,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:23,534 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:23,535 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:16:23,539 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:24,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4973#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:16:24,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:24,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:24,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 17:16:24,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894723390] [2023-12-02 17:16:24,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:24,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:16:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:24,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:16:24,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:16:24,516 INFO L87 Difference]: Start difference. First operand 145 states and 184 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:24,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:24,834 INFO L93 Difference]: Finished difference Result 245 states and 312 transitions. [2023-12-02 17:16:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:16:24,834 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2023-12-02 17:16:24,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:24,836 INFO L225 Difference]: With dead ends: 245 [2023-12-02 17:16:24,836 INFO L226 Difference]: Without dead ends: 187 [2023-12-02 17:16:24,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:16:24,838 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:24,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 88 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:16:24,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-12-02 17:16:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 155. [2023-12-02 17:16:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 122 states have internal predecessors, (151), 21 states have call successors, (21), 12 states have call predecessors, (21), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 17:16:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 193 transitions. [2023-12-02 17:16:24,952 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 193 transitions. Word has length 45 [2023-12-02 17:16:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:24,952 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 193 transitions. [2023-12-02 17:16:24,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2023-12-02 17:16:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 17:16:24,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:24,954 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:24,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 17:16:25,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:16:25,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:25,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash -135407774, now seen corresponding path program 6 times [2023-12-02 17:16:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:25,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224569358] [2023-12-02 17:16:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:25,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:25,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:25,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667879300] [2023-12-02 17:16:25,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:16:25,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:25,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:25,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:25,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:16:25,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:16:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:16:25,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:16:25,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:16:25,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:16:25,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:25,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224569358] [2023-12-02 17:16:25,354 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:25,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667879300] [2023-12-02 17:16:25,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667879300] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:25,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [743572754] [2023-12-02 17:16:25,357 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:16:25,357 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:25,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:25,357 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:25,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:25,872 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:25,874 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:16:25,877 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:26,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5969#(and (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |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 17:16:26,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:26,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:26,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 17:16:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097428689] [2023-12-02 17:16:26,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:26,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:16:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:16:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:16:26,945 INFO L87 Difference]: Start difference. First operand 155 states and 193 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:27,202 INFO L93 Difference]: Finished difference Result 172 states and 210 transitions. [2023-12-02 17:16:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:16:27,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2023-12-02 17:16:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:27,203 INFO L225 Difference]: With dead ends: 172 [2023-12-02 17:16:27,203 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 17:16:27,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:16:27,205 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 78 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:27,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 94 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:16:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 17:16:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2023-12-02 17:16:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 93 states have internal predecessors, (110), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 17:16:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2023-12-02 17:16:27,297 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 45 [2023-12-02 17:16:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:27,297 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2023-12-02 17:16:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2023-12-02 17:16:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 17:16:27,299 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:27,299 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:27,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:16:27,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 17:16:27,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:27,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:27,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2004149993, now seen corresponding path program 3 times [2023-12-02 17:16:27,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:27,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795991932] [2023-12-02 17:16:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:27,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:27,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548421875] [2023-12-02 17:16:27,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:16:27,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:27,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:27,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:27,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:16:27,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:16:27,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:16:27,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:16:27,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 17:16:27,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:27,741 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 17:16:27,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:27,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795991932] [2023-12-02 17:16:27,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:27,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548421875] [2023-12-02 17:16:27,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548421875] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:27,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917425310] [2023-12-02 17:16:27,743 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:16:27,743 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:27,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:27,744 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:27,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:28,554 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:28,555 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-12-02 17:16:28,559 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:29,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6784#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:16:29,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:29,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:29,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 17:16:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409373702] [2023-12-02 17:16:29,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:16:29,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:16:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:16:29,918 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 17:16:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:30,377 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2023-12-02 17:16:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:16:30,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2023-12-02 17:16:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:30,378 INFO L225 Difference]: With dead ends: 139 [2023-12-02 17:16:30,379 INFO L226 Difference]: Without dead ends: 136 [2023-12-02 17:16:30,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=355, Invalid=2195, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:16:30,380 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:30,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 94 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:16:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-02 17:16:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2023-12-02 17:16:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 92 states have internal predecessors, (109), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 17:16:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2023-12-02 17:16:30,484 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 48 [2023-12-02 17:16:30,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:30,485 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2023-12-02 17:16:30,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 17:16:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2023-12-02 17:16:30,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 17:16:30,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:30,486 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:30,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:16:30,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 17:16:30,686 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:30,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:30,687 INFO L85 PathProgramCache]: Analyzing trace with hash 121075703, now seen corresponding path program 7 times [2023-12-02 17:16:30,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:30,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229516490] [2023-12-02 17:16:30,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:30,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:30,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:30,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576349237] [2023-12-02 17:16:30,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:16:30,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:30,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:30,701 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:30,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:16:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:16:30,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:16:30,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 17:16:30,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 43 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-02 17:16:30,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229516490] [2023-12-02 17:16:30,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:30,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576349237] [2023-12-02 17:16:30,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576349237] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:30,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601356788] [2023-12-02 17:16:30,911 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:16:30,911 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:30,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:30,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:30,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:31,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:31,593 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:16:31,596 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:32,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7571#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:16:32,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:32,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:32,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-02 17:16:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550435197] [2023-12-02 17:16:32,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:32,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:16:32,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:32,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:16:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:16:32,642 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:32,851 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2023-12-02 17:16:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:16:32,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-12-02 17:16:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:32,852 INFO L225 Difference]: With dead ends: 120 [2023-12-02 17:16:32,853 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 17:16:32,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:16:32,854 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:32,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 102 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:16:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 17:16:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-02 17:16:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 62 states have internal predecessors, (76), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 17:16:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2023-12-02 17:16:32,919 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 48 [2023-12-02 17:16:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:32,919 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2023-12-02 17:16:32,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:32,919 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2023-12-02 17:16:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 17:16:32,920 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:32,920 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:32,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:16:33,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:33,121 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:33,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:33,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1149629116, now seen corresponding path program 8 times [2023-12-02 17:16:33,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:33,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913328505] [2023-12-02 17:16:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:33,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:33,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880090134] [2023-12-02 17:16:33,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:16:33,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:33,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:33,133 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:33,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:16:33,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-12-02 17:16:33,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:16:33,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:16:33,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 17:16:34,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:16:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 17:16:34,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:16:34,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913328505] [2023-12-02 17:16:34,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:16:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880090134] [2023-12-02 17:16:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880090134] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:16:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144043716] [2023-12-02 17:16:34,098 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:16:34,099 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:16:34,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:16:34,099 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:16:34,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:16:34,674 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:16:34,675 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:16:34,679 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:16:35,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8242#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:16:35,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:16:35,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:16:35,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-02 17:16:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653538184] [2023-12-02 17:16:35,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:16:35,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:16:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:16:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:16:35,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:16:35,785 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:16:36,103 INFO L93 Difference]: Finished difference Result 124 states and 151 transitions. [2023-12-02 17:16:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 17:16:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2023-12-02 17:16:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:16:36,105 INFO L225 Difference]: With dead ends: 124 [2023-12-02 17:16:36,105 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 17:16:36,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1429, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:16:36,106 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:16:36,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 71 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:16:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 17:16:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2023-12-02 17:16:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-02 17:16:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-12-02 17:16:36,163 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 49 [2023-12-02 17:16:36,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:16:36,163 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-12-02 17:16:36,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:16:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-12-02 17:16:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 17:16:36,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:16:36,164 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:16:36,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-02 17:16:36,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:36,364 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:16:36,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:16:36,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1423513725, now seen corresponding path program 9 times [2023-12-02 17:16:36,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:16:36,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012021301] [2023-12-02 17:16:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:16:36,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:16:36,376 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:16:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912415047] [2023-12-02 17:16:36,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:16:36,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:16:36,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:16:36,377 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:16:36,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:16:37,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:16:37,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:16:37,585 WARN L260 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-02 17:16:37,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:16:37,621 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 17:16:37,647 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 17:16:37,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:16:37,685 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 17:16:37,791 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:16:37,791 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 17:16:37,848 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:16:37,848 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 17:16:37,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:16:37,915 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 68 [2023-12-02 17:16:38,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:16:38,091 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 66 treesize of output 80 [2023-12-02 17:16:38,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:16:38,189 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 75 treesize of output 92 [2023-12-02 17:16:38,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:16:38,298 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 84 treesize of output 104 [2023-12-02 17:17:15,435 INFO L349 Elim1Store]: treesize reduction 2033, result has 7.3 percent of original size [2023-12-02 17:17:15,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 188 treesize of output 227 [2023-12-02 17:17:17,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:17:17,099 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 112 treesize of output 106 [2023-12-02 17:17:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:17:17,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:17:47,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:17:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012021301] [2023-12-02 17:17:47,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:17:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912415047] [2023-12-02 17:17:47,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912415047] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:17:47,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585949518] [2023-12-02 17:17:47,969 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:17:47,970 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:17:47,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:17:47,970 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:17:47,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:17:48,637 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:17:48,638 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:17:48,642 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:17:56,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8890#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:17:56,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:17:56,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:17:56,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2023-12-02 17:17:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033008492] [2023-12-02 17:17:56,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:17:56,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 17:17:56,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:17:56,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 17:17:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=5234, Unknown=15, NotChecked=0, Total=5852 [2023-12-02 17:17:56,378 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:17:58,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:18:00,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:18:02,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:18:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:11,300 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2023-12-02 17:18:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 17:18:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 54 [2023-12-02 17:18:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:11,302 INFO L225 Difference]: With dead ends: 157 [2023-12-02 17:18:11,302 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 17:18:11,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=1187, Invalid=8898, Unknown=15, NotChecked=0, Total=10100 [2023-12-02 17:18:11,306 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 55 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:11,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 154 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 843 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2023-12-02 17:18:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 17:18:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 115. [2023-12-02 17:18:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 94 states have (on average 1.2340425531914894) internal successors, (116), 95 states have internal predecessors, (116), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 17:18:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2023-12-02 17:18:11,448 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 54 [2023-12-02 17:18:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:11,448 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2023-12-02 17:18:11,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:18:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2023-12-02 17:18:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 17:18:11,449 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:11,449 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:11,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:18:11,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:11,650 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:18:11,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash -249227004, now seen corresponding path program 10 times [2023-12-02 17:18:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694801205] [2023-12-02 17:18:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:11,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:11,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903084296] [2023-12-02 17:18:11,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:18:11,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:11,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:11,665 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:11,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:18:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:11,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:18:11,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 17:18:11,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 47 proven. 30 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 17:18:11,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694801205] [2023-12-02 17:18:11,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903084296] [2023-12-02 17:18:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903084296] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:11,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [308747582] [2023-12-02 17:18:11,922 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:18:11,922 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:11,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:11,922 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:11,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:12,600 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:18:12,601 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:18:12,607 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:14,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9771#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:18:14,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:14,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:14,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-02 17:18:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68604898] [2023-12-02 17:18:14,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:14,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:18:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:18:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:18:14,030 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:18:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:14,492 INFO L93 Difference]: Finished difference Result 276 states and 342 transitions. [2023-12-02 17:18:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:18:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2023-12-02 17:18:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:14,494 INFO L225 Difference]: With dead ends: 276 [2023-12-02 17:18:14,494 INFO L226 Difference]: Without dead ends: 183 [2023-12-02 17:18:14,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:18:14,496 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 75 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:14,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 90 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:18:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-12-02 17:18:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2023-12-02 17:18:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 140 states have (on average 1.2357142857142858) internal successors, (173), 142 states have internal predecessors, (173), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 17:18:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2023-12-02 17:18:14,732 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 55 [2023-12-02 17:18:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:14,732 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2023-12-02 17:18:14,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:18:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2023-12-02 17:18:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 17:18:14,734 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:14,734 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:14,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 17:18:14,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 17:18:14,935 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:18:14,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1171673148, now seen corresponding path program 11 times [2023-12-02 17:18:14,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:14,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972224727] [2023-12-02 17:18:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:14,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:14,950 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:14,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303031040] [2023-12-02 17:18:14,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:18:14,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:14,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:14,952 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:14,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:18:16,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 17:18:16,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:18:16,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:18:16,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 17:18:16,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:18:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 17:18:16,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:18:16,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972224727] [2023-12-02 17:18:16,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:18:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303031040] [2023-12-02 17:18:16,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303031040] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:18:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907359366] [2023-12-02 17:18:16,459 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:18:16,459 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:18:16,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:18:16,459 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:18:16,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:18:17,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:18:17,262 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:18:17,266 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:18:18,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10926#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:18:18,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:18:18,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:18:18,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-02 17:18:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754862474] [2023-12-02 17:18:18,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:18:18,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:18:18,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:18:18,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:18:18,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:18:18,888 INFO L87 Difference]: Start difference. First operand 174 states and 213 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 17:18:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:18:19,350 INFO L93 Difference]: Finished difference Result 214 states and 259 transitions. [2023-12-02 17:18:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 17:18:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2023-12-02 17:18:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:18:19,352 INFO L225 Difference]: With dead ends: 214 [2023-12-02 17:18:19,352 INFO L226 Difference]: Without dead ends: 154 [2023-12-02 17:18:19,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 128 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:18:19,353 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:18:19,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 70 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:18:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-02 17:18:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 141. [2023-12-02 17:18:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 17:18:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 165 transitions. [2023-12-02 17:18:19,530 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 165 transitions. Word has length 55 [2023-12-02 17:18:19,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:18:19,531 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 165 transitions. [2023-12-02 17:18:19,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 17:18:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 165 transitions. [2023-12-02 17:18:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 17:18:19,532 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:18:19,532 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:18:19,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-02 17:18:19,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 17:18:19,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:18:19,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:18:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash -44636199, now seen corresponding path program 4 times [2023-12-02 17:18:19,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:18:19,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007694810] [2023-12-02 17:18:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:18:19,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:18:19,748 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:18:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071679963] [2023-12-02 17:18:19,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:18:19,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:18:19,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:18:19,749 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:18:19,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:18:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:18:20,943 WARN L260 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 158 conjunts are in the unsatisfiable core [2023-12-02 17:18:20,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:18:21,029 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 17:18:21,070 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 17:18:21,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:18:21,128 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 17:18:21,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:18:21,283 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 17:18:21,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:18:21,360 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 17:18:21,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:18:21,435 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 68 [2023-12-02 17:18:21,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:18:21,685 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 66 treesize of output 80 [2023-12-02 17:18:21,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:18:21,813 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 75 treesize of output 92 [2023-12-02 17:18:21,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:18:21,948 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 84 treesize of output 104 [2023-12-02 17:19:04,799 INFO L349 Elim1Store]: treesize reduction 2069, result has 13.4 percent of original size [2023-12-02 17:19:04,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 239 treesize of output 415 [2023-12-02 17:19:29,705 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:19:29,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 99 treesize of output 35 [2023-12-02 17:19:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:19:29,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:19:41,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:19:41,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007694810] [2023-12-02 17:19:41,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:19:41,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071679963] [2023-12-02 17:19:41,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071679963] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:19:41,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1838495616] [2023-12-02 17:19:41,004 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:19:41,004 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:19:41,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:19:41,004 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:19:41,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:19:41,739 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:19:41,740 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-12-02 17:19:41,743 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:19:46,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11917#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:19:46,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:19:46,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:19:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2023-12-02 17:19:46,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895682515] [2023-12-02 17:19:46,901 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:19:46,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 17:19:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:19:46,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 17:19:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1070, Invalid=8421, Unknown=15, NotChecked=0, Total=9506 [2023-12-02 17:19:46,904 INFO L87 Difference]: Start difference. First operand 141 states and 165 transitions. Second operand has 48 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:19:50,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:19:58,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:01,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:03,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:05,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:07,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:20:09,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:20:11,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:14,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:16,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:18,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:20:20,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:20:22,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:20:24,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:26,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:28,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:20:31,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:34,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:36,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:38,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:40,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:42,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:44,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:46,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:48,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:50,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:53,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:55,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:57,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:20:59,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:01,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:03,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:05,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:06,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:08,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:10,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:12,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:21:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:12,848 INFO L93 Difference]: Finished difference Result 239 states and 295 transitions. [2023-12-02 17:21:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-02 17:21:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2023-12-02 17:21:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:12,852 INFO L225 Difference]: With dead ends: 239 [2023-12-02 17:21:12,852 INFO L226 Difference]: Without dead ends: 236 [2023-12-02 17:21:12,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5397 ImplicationChecksByTransitivity, 85.5s TimeCoverageRelationStatistics Valid=1624, Invalid=11932, Unknown=16, NotChecked=0, Total=13572 [2023-12-02 17:21:12,854 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 124 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 39 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:12,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 177 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1087 Invalid, 35 Unknown, 0 Unchecked, 79.2s Time] [2023-12-02 17:21:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-12-02 17:21:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 158. [2023-12-02 17:21:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 125 states have internal predecessors, (145), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 17:21:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2023-12-02 17:21:13,029 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 58 [2023-12-02 17:21:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:13,030 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2023-12-02 17:21:13,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 41 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:21:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2023-12-02 17:21:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 17:21:13,031 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:13,031 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:13,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 17:21:13,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:21:13,231 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:13,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:13,232 INFO L85 PathProgramCache]: Analyzing trace with hash -804315815, now seen corresponding path program 12 times [2023-12-02 17:21:13,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:13,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35691737] [2023-12-02 17:21:13,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:13,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:13,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:13,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529451511] [2023-12-02 17:21:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:21:13,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:13,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:13,245 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:13,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:21:13,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:21:13,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:21:13,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:21:13,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 13 proven. 125 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 17:21:13,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:21:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 17:21:13,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:13,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35691737] [2023-12-02 17:21:13,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:21:13,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529451511] [2023-12-02 17:21:13,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529451511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:21:13,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325889637] [2023-12-02 17:21:13,573 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:21:13,573 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:21:13,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:21:13,573 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:21:13,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:21:14,085 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:21:14,087 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:21:14,090 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:21:15,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13021#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:21:15,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:21:15,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:21:15,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-12-02 17:21:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621637091] [2023-12-02 17:21:15,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:21:15,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:21:15,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:21:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:21:15,178 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:21:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:15,786 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2023-12-02 17:21:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 17:21:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-12-02 17:21:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:15,788 INFO L225 Difference]: With dead ends: 175 [2023-12-02 17:21:15,788 INFO L226 Difference]: Without dead ends: 172 [2023-12-02 17:21:15,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=577, Invalid=3083, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 17:21:15,789 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:15,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 129 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:21:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-12-02 17:21:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2023-12-02 17:21:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 131 states have internal predecessors, (152), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 17:21:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2023-12-02 17:21:15,996 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 60 [2023-12-02 17:21:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:15,997 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2023-12-02 17:21:15,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:21:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2023-12-02 17:21:15,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 17:21:15,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:15,997 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:16,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 17:21:16,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:16,198 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:16,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash 818101150, now seen corresponding path program 5 times [2023-12-02 17:21:16,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:16,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992383210] [2023-12-02 17:21:16,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:16,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:16,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825260656] [2023-12-02 17:21:16,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:21:16,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:16,210 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:16,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:21:16,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 17:21:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:21:16,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:21:16,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 58 proven. 54 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-02 17:21:16,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:21:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 58 proven. 54 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-02 17:21:16,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992383210] [2023-12-02 17:21:16,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:21:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825260656] [2023-12-02 17:21:16,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825260656] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:21:16,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782342479] [2023-12-02 17:21:16,868 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:21:16,868 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:21:16,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:21:16,868 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:21:16,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:21:17,652 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:21:17,654 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-12-02 17:21:17,666 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:21:19,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14060#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:21:19,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:21:19,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:21:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-12-02 17:21:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711417634] [2023-12-02 17:21:19,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:21:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 17:21:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 17:21:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:21:19,062 INFO L87 Difference]: Start difference. First operand 164 states and 192 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 17:21:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:19,570 INFO L93 Difference]: Finished difference Result 285 states and 325 transitions. [2023-12-02 17:21:19,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:21:19,570 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 63 [2023-12-02 17:21:19,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:19,571 INFO L225 Difference]: With dead ends: 285 [2023-12-02 17:21:19,571 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 17:21:19,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=316, Invalid=1846, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 17:21:19,572 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:19,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 56 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:21:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 17:21:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 152. [2023-12-02 17:21:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 118 states have (on average 1.152542372881356) internal successors, (136), 119 states have internal predecessors, (136), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 17:21:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2023-12-02 17:21:19,738 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 63 [2023-12-02 17:21:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:19,738 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2023-12-02 17:21:19,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 17:21:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2023-12-02 17:21:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 17:21:19,739 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:19,739 INFO L195 NwaCegarLoop]: trace histogram [16, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:19,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 17:21:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:19,940 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:19,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -313874757, now seen corresponding path program 13 times [2023-12-02 17:21:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:19,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298345317] [2023-12-02 17:21:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:19,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:19,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137728155] [2023-12-02 17:21:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:21:19,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:19,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:19,955 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:19,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:21:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:20,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:21:20,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-02 17:21:20,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:21:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-12-02 17:21:20,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:21:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298345317] [2023-12-02 17:21:20,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:21:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137728155] [2023-12-02 17:21:20,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137728155] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:21:20,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731979475] [2023-12-02 17:21:20,277 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:21:20,277 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:21:20,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:21:20,278 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:21:20,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:21:20,846 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-12-02 17:21:20,847 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-12-02 17:21:20,852 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:21:22,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15280#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:21:22,016 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:21:22,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:21:22,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-12-02 17:21:22,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725523652] [2023-12-02 17:21:22,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 17:21:22,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:21:22,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:21:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:21:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 17:21:22,018 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:21:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:21:22,474 INFO L93 Difference]: Finished difference Result 223 states and 262 transitions. [2023-12-02 17:21:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 17:21:22,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-12-02 17:21:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:21:22,476 INFO L225 Difference]: With dead ends: 223 [2023-12-02 17:21:22,476 INFO L226 Difference]: Without dead ends: 168 [2023-12-02 17:21:22,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=299, Invalid=2151, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 17:21:22,477 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:21:22,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 96 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:21:22,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-12-02 17:21:22,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2023-12-02 17:21:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 124 states have (on average 1.153225806451613) internal successors, (143), 125 states have internal predecessors, (143), 20 states have call successors, (20), 13 states have call predecessors, (20), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 17:21:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2023-12-02 17:21:22,668 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 66 [2023-12-02 17:21:22,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:21:22,668 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2023-12-02 17:21:22,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:21:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2023-12-02 17:21:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:21:22,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:21:22,669 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:21:22,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 17:21:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 17:21:22,869 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:21:22,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:21:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1184713726, now seen corresponding path program 1 times [2023-12-02 17:21:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:21:22,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412467155] [2023-12-02 17:21:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:21:22,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:21:22,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804318766] [2023-12-02 17:21:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:21:22,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:21:22,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:21:22,886 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:21:22,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:21:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:21:23,767 WARN L260 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 156 conjunts are in the unsatisfiable core [2023-12-02 17:21:23,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:21:23,814 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 17:21:23,846 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 17:21:23,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:21:23,883 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 17:21:24,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:21:24,017 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 17:21:24,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:21:24,068 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 17:21:24,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:21:24,134 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 68 [2023-12-02 17:21:24,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:21:24,345 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 66 treesize of output 80 [2023-12-02 17:21:24,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:21:24,439 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 75 treesize of output 92 [2023-12-02 17:21:24,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:21:24,533 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 84 treesize of output 104 [2023-12-02 17:22:02,467 INFO L349 Elim1Store]: treesize reduction 340, result has 19.0 percent of original size [2023-12-02 17:22:02,467 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 54 case distinctions, treesize of input 109 treesize of output 121 [2023-12-02 17:22:48,488 INFO L349 Elim1Store]: treesize reduction 2069, result has 13.4 percent of original size [2023-12-02 17:22:48,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 239 treesize of output 415 [2023-12-02 17:23:12,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:23:12,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 99 treesize of output 35 [2023-12-02 17:23:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 18 proven. 146 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 17:23:13,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:23:26,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:23:26,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412467155] [2023-12-02 17:23:26,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:23:26,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804318766] [2023-12-02 17:23:26,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804318766] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:23:26,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1769815404] [2023-12-02 17:23:26,057 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:23:26,057 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:23:26,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:23:26,058 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:23:26,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:23:27,211 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-12-02 17:23:27,212 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 9 for LOIs [2023-12-02 17:23:27,214 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:23:32,204 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16361#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:23:32,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:23:32,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:23:32,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2023-12-02 17:23:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548353645] [2023-12-02 17:23:32,205 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:23:32,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 17:23:32,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:23:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 17:23:32,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=8459, Unknown=13, NotChecked=0, Total=9120 [2023-12-02 17:23:32,208 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 49 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:23:35,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:23:37,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:23:39,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:23:45,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:23:48,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:23:50,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:23:52,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:23:54,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:23:57,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:23:59,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:24:01,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:24:03,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:24:05,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:24:07,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:24:09,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:24:11,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:24:13,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:24:15,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:24:17,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:24:20,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:24:22,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:24:24,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:24:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:24:24,734 INFO L93 Difference]: Finished difference Result 190 states and 220 transitions. [2023-12-02 17:24:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 17:24:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 72 [2023-12-02 17:24:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:24:24,736 INFO L225 Difference]: With dead ends: 190 [2023-12-02 17:24:24,736 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 17:24:24,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4702 ImplicationChecksByTransitivity, 122.5s TimeCoverageRelationStatistics Valid=872, Invalid=10035, Unknown=13, NotChecked=0, Total=10920 [2023-12-02 17:24:24,737 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 66 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 10 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:24:24,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 228 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1518 Invalid, 21 Unknown, 0 Unchecked, 50.1s Time] [2023-12-02 17:24:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 17:24:24,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 145. [2023-12-02 17:24:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 118 states have (on average 1.152542372881356) internal successors, (136), 118 states have internal predecessors, (136), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 17:24:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2023-12-02 17:24:24,897 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 72 [2023-12-02 17:24:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:24:24,897 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2023-12-02 17:24:24,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 5 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-02 17:24:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2023-12-02 17:24:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:24:24,898 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:24:24,898 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:24:24,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-02 17:24:25,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:24:25,099 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:24:25,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:24:25,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1317199998, now seen corresponding path program 2 times [2023-12-02 17:24:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:24:25,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224195281] [2023-12-02 17:24:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:24:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:24:25,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:24:25,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669879193] [2023-12-02 17:24:25,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:24:25,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:24:25,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:24:25,114 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:24:25,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 17:24:26,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 17:24:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:24:26,347 WARN L260 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 163 conjunts are in the unsatisfiable core [2023-12-02 17:24:26,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:24:26,394 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 17:24:26,427 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 17:24:26,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:24:26,471 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 17:24:26,598 INFO L349 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2023-12-02 17:24:26,598 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 17:24:26,684 INFO L349 Elim1Store]: treesize reduction 80, result has 24.5 percent of original size [2023-12-02 17:24:26,684 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 61 [2023-12-02 17:24:26,796 INFO L349 Elim1Store]: treesize reduction 155, result has 24.0 percent of original size [2023-12-02 17:24:26,797 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 15 case distinctions, treesize of input 68 treesize of output 79 [2023-12-02 17:24:27,163 INFO L349 Elim1Store]: treesize reduction 224, result has 21.4 percent of original size [2023-12-02 17:24:27,163 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 21 case distinctions, treesize of input 78 treesize of output 92 [2023-12-02 17:24:27,484 INFO L349 Elim1Store]: treesize reduction 294, result has 17.2 percent of original size [2023-12-02 17:24:27,485 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 27 case distinctions, treesize of input 92 treesize of output 109 [2023-12-02 17:24:27,840 INFO L349 Elim1Store]: treesize reduction 370, result has 14.2 percent of original size [2023-12-02 17:24:27,840 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 34 case distinctions, treesize of input 106 treesize of output 126 [2023-12-02 17:24:37,417 INFO L349 Elim1Store]: treesize reduction 2069, result has 13.4 percent of original size [2023-12-02 17:24:37,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 239 treesize of output 415 [2023-12-02 17:24:59,166 INFO L349 Elim1Store]: treesize reduction 340, result has 19.0 percent of original size [2023-12-02 17:24:59,166 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 54 case distinctions, treesize of input 119 treesize of output 125 [2023-12-02 17:25:28,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:25:28,544 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 129 treesize of output 111 [2023-12-02 17:25:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 10 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:25:28,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:25:45,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:25:45,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224195281] [2023-12-02 17:25:45,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 17:25:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669879193] [2023-12-02 17:25:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669879193] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:25:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639339990] [2023-12-02 17:25:45,069 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 17:25:45,069 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:25:45,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:25:45,070 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:25:45,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:25:46,352 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-12-02 17:25:46,353 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 9 for LOIs [2023-12-02 17:25:46,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:25:50,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17404#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~index1~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index1~0#1|) (<= |ULTIMATE.start_main_~index2~0#1| 32766) (<= 0 |ULTIMATE.start_main_~index2~0#1|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (or (< (+ 4 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (+ (* ~ARR_SIZE~0 4) |ULTIMATE.start_main_~sum~0#1|)) (< |ULTIMATE.start_main_~sum~0#1| 0)) (<= 2 ~ARR_SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~ARR_SIZE~0 32767) (<= 2 |ULTIMATE.start_main_~#array~0#1.base|))' at error location [2023-12-02 17:25:50,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:25:50,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:25:50,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2023-12-02 17:25:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570786385] [2023-12-02 17:25:50,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 17:25:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 17:25:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:25:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 17:25:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=8900, Unknown=17, NotChecked=0, Total=9702 [2023-12-02 17:25:50,131 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 17:25:58,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:00,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:03,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:05,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:07,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:09,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:11,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:13,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:15,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:17,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:19,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:23,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:25,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:27,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:29,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:33,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:38,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:26:42,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:26:45,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:48,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:26:58,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:27:00,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:27:03,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:27:06,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 17:27:09,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 17:27:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:27:10,692 INFO L93 Difference]: Finished difference Result 181 states and 207 transitions. [2023-12-02 17:27:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 17:27:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 72 [2023-12-02 17:27:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:27:10,694 INFO L225 Difference]: With dead ends: 181 [2023-12-02 17:27:10,694 INFO L226 Difference]: Without dead ends: 161 [2023-12-02 17:27:10,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5901 ImplicationChecksByTransitivity, 100.6s TimeCoverageRelationStatistics Valid=1443, Invalid=13293, Unknown=26, NotChecked=0, Total=14762 [2023-12-02 17:27:10,696 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 83 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 40 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:27:10,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 190 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1118 Invalid, 22 Unknown, 0 Unchecked, 54.2s Time] [2023-12-02 17:27:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-02 17:27:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2023-12-02 17:27:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 124 states have internal predecessors, (142), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-02 17:27:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 182 transitions. [2023-12-02 17:27:10,868 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 182 transitions. Word has length 72 [2023-12-02 17:27:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:27:10,869 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 182 transitions. [2023-12-02 17:27:10,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 17:27:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 182 transitions. [2023-12-02 17:27:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:27:10,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:27:10,869 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:27:10,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 17:27:11,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:11,070 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:27:11,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:27:11,070 INFO L85 PathProgramCache]: Analyzing trace with hash -890903458, now seen corresponding path program 1 times [2023-12-02 17:27:11,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:27:11,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34753047] [2023-12-02 17:27:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:11,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:27:11,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 17:27:11,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786209611] [2023-12-02 17:27:11,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:27:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:27:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:27:11,083 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:27:11,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f7cbfc2-b938-4cfd-be40-4a5a442040e0/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:27:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:27:11,745 WARN L260 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 185 conjunts are in the unsatisfiable core [2023-12-02 17:27:11,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:27:11,829 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 17:27:11,861 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 17:27:11,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:27:11,921 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 17:27:12,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:27:12,053 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 17:27:12,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:27:12,118 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 17:27:12,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:27:12,199 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 68 [2023-12-02 17:27:12,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:27:12,431 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 66 treesize of output 80 [2023-12-02 17:27:12,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:27:12,538 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 75 treesize of output 92 [2023-12-02 17:27:12,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 17:27:12,668 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 84 treesize of output 104 [2023-12-02 17:27:59,097 INFO L349 Elim1Store]: treesize reduction 2069, result has 13.4 percent of original size [2023-12-02 17:27:59,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 189 case distinctions, treesize of input 239 treesize of output 415