./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array21_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array21_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire --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 f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:29:52,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:29:53,058 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:29:53,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:29:53,066 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:29:53,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:29:53,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:29:53,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:29:53,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:29:53,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:29:53,098 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:29:53,099 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:29:53,099 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:29:53,100 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:29:53,101 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:29:53,101 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:29:53,102 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:29:53,109 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:29:53,109 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:29:53,110 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:29:53,110 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:29:53,111 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:29:53,112 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:29:53,112 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:29:53,113 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:29:53,113 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:29:53,114 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:29:53,114 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:29:53,114 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:29:53,115 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:29:53,115 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:29:53,116 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:29:53,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:29:53,117 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:29:53,117 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:29:53,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:29:53,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:29:53,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:53,119 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:29:53,120 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:29:53,120 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:29:53,121 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:29:53,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:29:53,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:29:53,122 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:29:53,122 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:29:53,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:29:53,123 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_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 [2023-11-23 21:29:53,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:29:53,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:29:53,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:29:53,391 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:29:53,392 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:29:53,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-patterns/array21_pattern.c [2023-11-23 21:29:56,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:29:56,629 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:29:56,630 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/sv-benchmarks/c/array-patterns/array21_pattern.c [2023-11-23 21:29:56,638 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/data/5af59aceb/83a75eb9950449369b02085f95228214/FLAGde65ed105 [2023-11-23 21:29:56,654 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/data/5af59aceb/83a75eb9950449369b02085f95228214 [2023-11-23 21:29:56,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:29:56,659 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:29:56,660 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:56,660 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:29:56,669 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:29:56,670 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:56,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0c198f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56, skipping insertion in model container [2023-11-23 21:29:56,671 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:56,698 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:29:56,857 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_384a3a56-013d-49f2-9aa0-7686c9bf87ca/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2023-11-23 21:29:56,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:56,892 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:29:56,905 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_384a3a56-013d-49f2-9aa0-7686c9bf87ca/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2023-11-23 21:29:56,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:56,929 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:29:56,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56 WrapperNode [2023-11-23 21:29:56,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:56,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:56,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:29:56,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:29:56,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:56,948 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:56,972 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2023-11-23 21:29:56,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:56,973 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:29:56,973 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:29:56,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:29:56,984 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:56,985 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,004 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,041 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:29:57,042 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:29:57,042 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:29:57,042 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:29:57,043 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (1/1) ... [2023-11-23 21:29:57,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:57,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:57,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:29:57,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:29:57,141 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-11-23 21:29:57,142 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-11-23 21:29:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:29:57,142 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:29:57,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:29:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:29:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:29:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:29:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:29:57,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:29:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:29:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:29:57,258 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:29:57,260 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:29:57,482 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:29:57,549 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:29:57,550 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 21:29:57,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:57 BoogieIcfgContainer [2023-11-23 21:29:57,552 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:29:57,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:29:57,566 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:29:57,573 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:29:57,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:29:56" (1/3) ... [2023-11-23 21:29:57,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ec6cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:57, skipping insertion in model container [2023-11-23 21:29:57,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:56" (2/3) ... [2023-11-23 21:29:57,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ec6cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:57, skipping insertion in model container [2023-11-23 21:29:57,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:57" (3/3) ... [2023-11-23 21:29:57,580 INFO L112 eAbstractionObserver]: Analyzing ICFG array21_pattern.c [2023-11-23 21:29:57,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:29:57,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:29:57,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:29:57,693 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;@6c8028fe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:29:57,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:29:57,699 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) [2023-11-23 21:29:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:29:57,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:57,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:57,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:57,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:57,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1351545904, now seen corresponding path program 1 times [2023-11-23 21:29:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:57,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010195482] [2023-11-23 21:29:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:57,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:57,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:57,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058382373] [2023-11-23 21:29:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:57,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:57,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:57,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:57,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:29:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:57,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-23 21:29:57,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:29:58,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:58,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010195482] [2023-11-23 21:29:58,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058382373] [2023-11-23 21:29:58,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058382373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:58,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:58,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:29:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805221653] [2023-11-23 21:29:58,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:58,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:29:58,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:29:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:29:58,059 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) [2023-11-23 21:29:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:58,102 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-23 21:29:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:29:58,105 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 [2023-11-23 21:29:58,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:58,123 INFO L225 Difference]: With dead ends: 35 [2023-11-23 21:29:58,124 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 21:29:58,130 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 [2023-11-23 21:29:58,138 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 [2023-11-23 21:29:58,142 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] [2023-11-23 21:29:58,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 21:29:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 21:29:58,192 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) [2023-11-23 21:29:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-11-23 21:29:58,195 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 11 [2023-11-23 21:29:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:58,197 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-11-23 21:29:58,197 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) [2023-11-23 21:29:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-11-23 21:29:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:29:58,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:58,200 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] [2023-11-23 21:29:58,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:58,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:29:58,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:58,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -302271629, now seen corresponding path program 1 times [2023-11-23 21:29:58,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:58,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732434103] [2023-11-23 21:29:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:58,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:58,423 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:58,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891699171] [2023-11-23 21:29:58,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:58,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:58,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:58,426 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:58,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:29:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:58,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:29:58,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:58,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:58,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:58,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732434103] [2023-11-23 21:29:58,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:58,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891699171] [2023-11-23 21:29:58,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891699171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:58,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:58,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:29:58,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284574961] [2023-11-23 21:29:58,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:29:58,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:29:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:29:58,652 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:29:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:58,746 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2023-11-23 21:29:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-11-23 21:29:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:58,748 INFO L225 Difference]: With dead ends: 56 [2023-11-23 21:29:58,749 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 21:29:58,749 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 [2023-11-23 21:29:58,751 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:58,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:58,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 21:29:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-11-23 21:29:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2023-11-23 21:29:58,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-11-23 21:29:58,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 24 [2023-11-23 21:29:58,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:58,760 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-11-23 21:29:58,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-23 21:29:58,761 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-11-23 21:29:58,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 21:29:58,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:58,762 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] [2023-11-23 21:29:58,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:58,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:58,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:58,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash 288712179, now seen corresponding path program 1 times [2023-11-23 21:29:58,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:58,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015153713] [2023-11-23 21:29:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:58,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:59,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:59,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267905518] [2023-11-23 21:29:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:59,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:59,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:59,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:59,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:29:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:59,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:29:59,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:59,152 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:59,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015153713] [2023-11-23 21:29:59,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267905518] [2023-11-23 21:29:59,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267905518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:59,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:59,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:29:59,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111205335] [2023-11-23 21:29:59,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:59,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:29:59,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:59,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:29:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:29:59,156 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:59,217 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-11-23 21:29:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:29:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 26 [2023-11-23 21:29:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:59,219 INFO L225 Difference]: With dead ends: 50 [2023-11-23 21:29:59,220 INFO L226 Difference]: Without dead ends: 28 [2023-11-23 21:29:59,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:29:59,224 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 [2023-11-23 21:29:59,225 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] [2023-11-23 21:29:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-23 21:29:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-23 21:29:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2023-11-23 21:29:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2023-11-23 21:29:59,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 26 [2023-11-23 21:29:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:59,248 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2023-11-23 21:29:59,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-11-23 21:29:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:29:59,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:59,254 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] [2023-11-23 21:29:59,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:59,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:59,474 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:59,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:59,474 INFO L85 PathProgramCache]: Analyzing trace with hash -682776838, now seen corresponding path program 1 times [2023-11-23 21:29:59,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:59,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556452521] [2023-11-23 21:29:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:59,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:59,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:29:59,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330196528] [2023-11-23 21:29:59,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:59,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:59,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:59,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:59,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:29:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:59,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:29:59,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:59,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:29:59,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:29:59,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556452521] [2023-11-23 21:29:59,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:29:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330196528] [2023-11-23 21:29:59,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330196528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113056327] [2023-11-23 21:29:59,746 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-23 21:29:59,747 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:59,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:59,760 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:59,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:01,086 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:01,088 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:01,097 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1113056327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:02,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:02,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [5, 5] total 24 [2023-11-23 21:30:02,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336273023] [2023-11-23 21:30:02,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:02,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:30:02,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:30:02,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:30:02,336 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:04,668 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-11-23 21:30:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:30:04,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-11-23 21:30:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:04,671 INFO L225 Difference]: With dead ends: 45 [2023-11-23 21:30:04,671 INFO L226 Difference]: Without dead ends: 42 [2023-11-23 21:30:04,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:30:04,673 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:04,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 59 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-23 21:30:04,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2023-11-23 21:30:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 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) [2023-11-23 21:30:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2023-11-23 21:30:04,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 27 [2023-11-23 21:30:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:04,703 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2023-11-23 21:30:04,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:04,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2023-11-23 21:30:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:30:04,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:04,709 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] [2023-11-23 21:30:04,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:04,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:04,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:04,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1611923139, now seen corresponding path program 1 times [2023-11-23 21:30:04,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:04,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720053819] [2023-11-23 21:30:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:04,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:04,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847784339] [2023-11-23 21:30:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:04,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:04,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:04,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:30:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:05,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:05,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:05,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:30:05,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720053819] [2023-11-23 21:30:05,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847784339] [2023-11-23 21:30:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847784339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234726591] [2023-11-23 21:30:05,120 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:30:05,120 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:05,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:05,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:05,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:06,361 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:06,363 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:06,368 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:07,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1062#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:07,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:07,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:07,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-23 21:30:07,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28907851] [2023-11-23 21:30:07,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:07,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:30:07,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:07,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:30:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-11-23 21:30:07,655 INFO L87 Difference]: Start difference. First operand 34 states and 42 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) [2023-11-23 21:30:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:07,800 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2023-11-23 21:30:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:30:07,801 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 [2023-11-23 21:30:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:07,803 INFO L225 Difference]: With dead ends: 64 [2023-11-23 21:30:07,803 INFO L226 Difference]: Without dead ends: 36 [2023-11-23 21:30:07,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:30:07,806 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:07,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 71 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-23 21:30:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-23 21:30:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 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) [2023-11-23 21:30:07,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-11-23 21:30:07,831 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 30 [2023-11-23 21:30:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:07,831 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-11-23 21:30:07,831 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) [2023-11-23 21:30:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-11-23 21:30:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:30:07,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:07,833 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] [2023-11-23 21:30:07,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:08,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:08,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:08,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:08,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1866086007, now seen corresponding path program 1 times [2023-11-23 21:30:08,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:08,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719905909] [2023-11-23 21:30:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:08,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:08,071 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:08,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931452303] [2023-11-23 21:30:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:08,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:08,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:08,083 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:08,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:30:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:08,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:30:08,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:30:08,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:30:08,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719905909] [2023-11-23 21:30:08,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:08,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931452303] [2023-11-23 21:30:08,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931452303] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386587576] [2023-11-23 21:30:08,305 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-11-23 21:30:08,305 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:08,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:08,306 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:08,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:09,117 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:09,119 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-11-23 21:30:09,124 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:10,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [386587576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:30:10,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:10,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [7, 7] total 31 [2023-11-23 21:30:10,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711045959] [2023-11-23 21:30:10,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:30:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 21:30:10,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 21:30:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:30:10,439 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-11-23 21:30:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:13,168 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2023-11-23 21:30:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:30:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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) Word has length 32 [2023-11-23 21:30:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:13,171 INFO L225 Difference]: With dead ends: 43 [2023-11-23 21:30:13,171 INFO L226 Difference]: Without dead ends: 40 [2023-11-23 21:30:13,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 21:30:13,174 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 64 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 32 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:13,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 55 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 331 Invalid, 4 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:30:13,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-23 21:30:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-11-23 21:30:13,189 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) [2023-11-23 21:30:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-23 21:30:13,190 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 32 [2023-11-23 21:30:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:13,191 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-23 21:30:13,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-11-23 21:30:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-23 21:30:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:30:13,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:13,193 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] [2023-11-23 21:30:13,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:13,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:30:13,409 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:13,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:13,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1661285675, now seen corresponding path program 2 times [2023-11-23 21:30:13,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:13,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996999309] [2023-11-23 21:30:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:13,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:13,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428086663] [2023-11-23 21:30:13,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:30:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:13,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:13,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:13,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:30:13,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:30:13,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:30:13,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:13,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:30:13,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:30:13,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:13,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996999309] [2023-11-23 21:30:13,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:13,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428086663] [2023-11-23 21:30:13,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428086663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:13,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376726722] [2023-11-23 21:30:13,665 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:30:13,666 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:13,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:13,666 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:13,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:14,537 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:14,539 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:14,542 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:15,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1803#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:15,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:15,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:15,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-23 21:30:15,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466748601] [2023-11-23 21:30:15,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:15,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:30:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:30:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-11-23 21:30:15,956 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) [2023-11-23 21:30:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:16,088 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-11-23 21:30:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:30:16,089 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 [2023-11-23 21:30:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:16,090 INFO L225 Difference]: With dead ends: 70 [2023-11-23 21:30:16,090 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:30:16,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:30:16,092 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:16,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 58 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:30:16,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-23 21:30:16,109 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) [2023-11-23 21:30:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-11-23 21:30:16,110 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 32 [2023-11-23 21:30:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:16,110 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-11-23 21:30:16,111 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) [2023-11-23 21:30:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-11-23 21:30:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:30:16,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:16,112 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] [2023-11-23 21:30:16,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:16,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:16,317 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:16,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2043806007, now seen corresponding path program 3 times [2023-11-23 21:30:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:16,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426562769] [2023-11-23 21:30:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:16,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:16,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:16,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728257873] [2023-11-23 21:30:16,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:30:16,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:16,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:16,353 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:16,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:30:16,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:30:16,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:30:16,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-23 21:30:16,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:16,793 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 [2023-11-23 21:30:16,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-23 21:30:16,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:30:16,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-23 21:30:17,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:30:17,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-23 21:30:17,974 INFO L349 Elim1Store]: treesize reduction 208, result has 33.5 percent of original size [2023-11-23 21:30:17,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 74 treesize of output 142 [2023-11-23 21:30:19,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:30:19,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 56 [2023-11-23 21:30:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:30:19,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:22,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:22,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426562769] [2023-11-23 21:30:22,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:22,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728257873] [2023-11-23 21:30:22,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728257873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:30:22,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [611872687] [2023-11-23 21:30:22,603 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:30:22,603 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:22,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:22,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:22,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:23,633 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:23,634 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:23,640 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:27,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2229#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:27,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:27,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:30:27,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-11-23 21:30:27,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266746241] [2023-11-23 21:30:27,387 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:27,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 21:30:27,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:27,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 21:30:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=3406, Unknown=0, NotChecked=0, Total=3782 [2023-11-23 21:30:27,391 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 28 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:28,374 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2023-11-23 21:30:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-23 21:30:28,375 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2023-11-23 21:30:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:28,376 INFO L225 Difference]: With dead ends: 101 [2023-11-23 21:30:28,377 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 21:30:28,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=404, Invalid=3756, Unknown=0, NotChecked=0, Total=4160 [2023-11-23 21:30:28,380 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:28,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 219 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:30:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 21:30:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2023-11-23 21:30:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 55 states have internal predecessors, (69), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 21:30:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2023-11-23 21:30:28,424 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 40 [2023-11-23 21:30:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:28,424 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2023-11-23 21:30:28,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:30:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2023-11-23 21:30:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 21:30:28,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:28,426 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-23 21:30:28,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:28,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:28,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:28,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash -521901570, now seen corresponding path program 4 times [2023-11-23 21:30:28,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:28,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60455221] [2023-11-23 21:30:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:28,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:28,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050357829] [2023-11-23 21:30:28,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:30:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:28,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:28,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:30:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:28,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:28,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:30:28,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:28,872 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:30:28,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60455221] [2023-11-23 21:30:28,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050357829] [2023-11-23 21:30:28,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050357829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328163394] [2023-11-23 21:30:28,878 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:30:28,879 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:28,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:28,880 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:28,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:29,594 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:29,595 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:29,601 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:30,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2791#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:30,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:30,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:30,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-23 21:30:30,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016265874] [2023-11-23 21:30:30,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:30,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:30:30,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:30:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:30:30,781 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2023-11-23 21:30:31,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:31,001 INFO L93 Difference]: Finished difference Result 179 states and 230 transitions. [2023-11-23 21:30:31,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:30:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 41 [2023-11-23 21:30:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:31,004 INFO L225 Difference]: With dead ends: 179 [2023-11-23 21:30:31,004 INFO L226 Difference]: Without dead ends: 122 [2023-11-23 21:30:31,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:30:31,007 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:31,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 98 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-23 21:30:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2023-11-23 21:30:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 21:30:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2023-11-23 21:30:31,098 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 41 [2023-11-23 21:30:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:31,098 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2023-11-23 21:30:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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) [2023-11-23 21:30:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2023-11-23 21:30:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 21:30:31,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:31,106 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-23 21:30:31,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:31,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:31,321 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:31,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1074102590, now seen corresponding path program 5 times [2023-11-23 21:30:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:31,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961450451] [2023-11-23 21:30:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:31,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:31,333 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:31,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069714019] [2023-11-23 21:30:31,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:30:31,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:31,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:31,334 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:31,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:30:31,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-23 21:30:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:30:31,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:31,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:30:31,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:30:31,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961450451] [2023-11-23 21:30:31,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069714019] [2023-11-23 21:30:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069714019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724129756] [2023-11-23 21:30:31,574 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:30:31,574 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:31,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:31,575 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:31,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:32,446 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:32,447 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:32,453 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:33,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3536#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:33,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:33,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:33,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-23 21:30:33,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130772660] [2023-11-23 21:30:33,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:33,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:30:33,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:30:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:30:33,711 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2023-11-23 21:30:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:33,961 INFO L93 Difference]: Finished difference Result 133 states and 165 transitions. [2023-11-23 21:30:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:30:33,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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 41 [2023-11-23 21:30:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:33,963 INFO L225 Difference]: With dead ends: 133 [2023-11-23 21:30:33,963 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 21:30:33,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:30:33,965 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:33,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 93 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:33,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 21:30:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2023-11-23 21:30:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 72 states have internal predecessors, (86), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-23 21:30:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-11-23 21:30:34,011 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 41 [2023-11-23 21:30:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:34,012 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-11-23 21:30:34,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2023-11-23 21:30:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-11-23 21:30:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:30:34,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:34,013 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] [2023-11-23 21:30:34,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:34,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:34,215 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:34,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1506403109, now seen corresponding path program 1 times [2023-11-23 21:30:34,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:34,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458167712] [2023-11-23 21:30:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:34,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:34,227 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:34,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203458280] [2023-11-23 21:30:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:34,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:34,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:34,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:34,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:30:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:34,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 21:30:34,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-23 21:30:34,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 21:30:34,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:34,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458167712] [2023-11-23 21:30:34,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203458280] [2023-11-23 21:30:34,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203458280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:34,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360419447] [2023-11-23 21:30:34,824 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-23 21:30:34,825 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:34,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:34,827 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:34,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:35,794 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:35,795 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-11-23 21:30:35,799 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:37,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4225#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:37,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:37,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:37,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-11-23 21:30:37,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212087662] [2023-11-23 21:30:37,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:37,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:30:37,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:30:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 21:30:37,620 INFO L87 Difference]: Start difference. First operand 92 states and 112 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) [2023-11-23 21:30:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:38,287 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2023-11-23 21:30:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:30:38,288 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 [2023-11-23 21:30:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:38,289 INFO L225 Difference]: With dead ends: 123 [2023-11-23 21:30:38,290 INFO L226 Difference]: Without dead ends: 93 [2023-11-23 21:30:38,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2023-11-23 21:30:38,295 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:38,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 152 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:30:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-23 21:30:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2023-11-23 21:30:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 70 states have internal predecessors, (83), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:30:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2023-11-23 21:30:38,379 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 44 [2023-11-23 21:30:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:38,379 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2023-11-23 21:30:38,379 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) [2023-11-23 21:30:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2023-11-23 21:30:38,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:30:38,382 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:38,382 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2023-11-23 21:30:38,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:38,599 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:38,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash -199154061, now seen corresponding path program 6 times [2023-11-23 21:30:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344086935] [2023-11-23 21:30:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:38,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:38,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:38,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168784770] [2023-11-23 21:30:38,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:30:38,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:38,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:38,614 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:38,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:30:38,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:30:38,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:30:38,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:38,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-23 21:30:38,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 21:30:38,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:38,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344086935] [2023-11-23 21:30:38,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168784770] [2023-11-23 21:30:38,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168784770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:38,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828799068] [2023-11-23 21:30:38,885 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:30:38,885 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:38,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:38,886 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:38,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:39,573 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:39,575 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:39,580 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:40,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4894#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:40,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:40,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:40,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-23 21:30:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650929389] [2023-11-23 21:30:40,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:40,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:30:40,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:30:40,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:30:40,788 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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) [2023-11-23 21:30:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:41,182 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2023-11-23 21:30:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 21:30:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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 [2023-11-23 21:30:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:41,184 INFO L225 Difference]: With dead ends: 104 [2023-11-23 21:30:41,185 INFO L226 Difference]: Without dead ends: 101 [2023-11-23 21:30:41,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 21:30:41,187 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 47 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:41,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 96 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:30:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-23 21:30:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2023-11-23 21:30:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.1866666666666668) internal successors, (89), 75 states have internal predecessors, (89), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:30:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-11-23 21:30:41,244 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 44 [2023-11-23 21:30:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:41,244 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-11-23 21:30:41,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 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) [2023-11-23 21:30:41,245 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-11-23 21:30:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 21:30:41,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:41,246 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] [2023-11-23 21:30:41,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:41,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:41,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:41,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash 356741945, now seen corresponding path program 7 times [2023-11-23 21:30:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:41,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629319479] [2023-11-23 21:30:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:41,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:41,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478905291] [2023-11-23 21:30:41,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:30:41,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:41,491 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:41,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:30:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:30:41,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:30:41,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:30:41,690 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:30:41,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:30:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:30:41,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:30:41,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629319479] [2023-11-23 21:30:41,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:30:41,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478905291] [2023-11-23 21:30:41,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478905291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:30:41,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84830029] [2023-11-23 21:30:41,764 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-23 21:30:41,764 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:30:41,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:30:41,765 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:30:41,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:30:42,334 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-23 21:30:42,336 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-23 21:30:42,339 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:30:43,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5551#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~ARR_SIZE~0 4) (+ 3 |ULTIMATE.start_main_~sum~0#1|)) (<= 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) (<= 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 [2023-11-23 21:30:43,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:30:43,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:30:43,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-23 21:30:43,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745896806] [2023-11-23 21:30:43,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:30:43,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:30:43,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:30:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:30:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:30:43,512 INFO L87 Difference]: Start difference. First operand 94 states and 111 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) [2023-11-23 21:30:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:30:43,878 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2023-11-23 21:30:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 21:30:43,879 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 [2023-11-23 21:30:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:30:43,880 INFO L225 Difference]: With dead ends: 109 [2023-11-23 21:30:43,880 INFO L226 Difference]: Without dead ends: 92 [2023-11-23 21:30:43,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 21:30:43,882 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:30:43,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 97 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:30:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-23 21:30:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2023-11-23 21:30:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:30:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2023-11-23 21:30:43,937 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 44 [2023-11-23 21:30:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:30:43,938 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2023-11-23 21:30:43,938 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) [2023-11-23 21:30:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2023-11-23 21:30:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 21:30:43,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:30:43,939 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] [2023-11-23 21:30:43,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:30:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 21:30:44,140 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:30:44,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:30:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1149629116, now seen corresponding path program 8 times [2023-11-23 21:30:44,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:30:44,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010111985] [2023-11-23 21:30:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:30:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:30:44,153 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:30:44,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060532475] [2023-11-23 21:30:44,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:30:44,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:30:44,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:30:44,155 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:30:44,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_384a3a56-013d-49f2-9aa0-7686c9bf87ca/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process