./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 cf1a7837 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_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array21_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX --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-cf1a783 [2023-11-12 00:14:01,327 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:14:01,419 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:14:01,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:14:01,426 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:14:01,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:14:01,456 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:14:01,456 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:14:01,457 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:14:01,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:14:01,458 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:14:01,459 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:14:01,459 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:14:01,460 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:14:01,460 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:14:01,461 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:14:01,462 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:14:01,462 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:14:01,463 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:14:01,463 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:14:01,464 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:14:01,472 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:14:01,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:14:01,474 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:14:01,479 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:14:01,479 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:14:01,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:14:01,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:14:01,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:14:01,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:14:01,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:14:01,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:14:01,483 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:14:01,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:14:01,484 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:14:01,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:14:01,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:01,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:14:01,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:14:01,485 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:14:01,486 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:14:01,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:14:01,486 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:14:01,486 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:14:01,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:14:01,487 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_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 [2023-11-12 00:14:01,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:14:01,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:14:01,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:14:01,812 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:14:01,813 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:14:01,816 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-patterns/array21_pattern.c [2023-11-12 00:14:04,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:14:05,214 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:14:05,216 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/sv-benchmarks/c/array-patterns/array21_pattern.c [2023-11-12 00:14:05,226 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/data/4981d0880/dd1a07fef8ca4568ae4ebf5ae0fbdf6c/FLAGc8cdab0f3 [2023-11-12 00:14:05,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/data/4981d0880/dd1a07fef8ca4568ae4ebf5ae0fbdf6c [2023-11-12 00:14:05,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:14:05,254 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:14:05,259 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:05,259 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:14:05,265 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:14:05,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,270 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54433c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05, skipping insertion in model container [2023-11-12 00:14:05,270 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,303 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:14:05,502 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_49394ec1-3c17-4bb2-951e-02a2a9b07944/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2023-11-12 00:14:05,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:05,542 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:14:05,557 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_49394ec1-3c17-4bb2-951e-02a2a9b07944/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2023-11-12 00:14:05,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:14:05,594 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:14:05,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05 WrapperNode [2023-11-12 00:14:05,595 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:14:05,596 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:05,596 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:14:05,596 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:14:05,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,610 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,636 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2023-11-12 00:14:05,636 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:14:05,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:14:05,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:14:05,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:14:05,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,658 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:14:05,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:14:05,671 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:14:05,671 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:14:05,672 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (1/1) ... [2023-11-12 00:14:05,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:14:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:05,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:14:05,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:14:05,759 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-11-12 00:14:05,760 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-11-12 00:14:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:14:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:14:05,760 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:14:05,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:14:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:14:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:14:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:14:05,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:14:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:14:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:14:05,832 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:14:05,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:14:06,082 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:14:06,149 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:14:06,149 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 00:14:06,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:06 BoogieIcfgContainer [2023-11-12 00:14:06,152 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:14:06,156 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:14:06,156 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:14:06,159 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:14:06,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:14:05" (1/3) ... [2023-11-12 00:14:06,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c73d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:06, skipping insertion in model container [2023-11-12 00:14:06,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:14:05" (2/3) ... [2023-11-12 00:14:06,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c73d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:14:06, skipping insertion in model container [2023-11-12 00:14:06,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:14:06" (3/3) ... [2023-11-12 00:14:06,163 INFO L112 eAbstractionObserver]: Analyzing ICFG array21_pattern.c [2023-11-12 00:14:06,184 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:14:06,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:14:06,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:14:06,240 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;@6ed86f8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:14:06,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:14:06,244 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) [2023-11-12 00:14:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:14:06,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:06,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:06,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:06,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash -445405455, now seen corresponding path program 1 times [2023-11-12 00:14:06,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:06,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420599182] [2023-11-12 00:14:06,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:06,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:06,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:06,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610773795] [2023-11-12 00:14:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:06,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:06,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:06,392 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:06,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:14:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:06,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:14:06,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:14:06,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:06,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:06,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420599182] [2023-11-12 00:14:06,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:06,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610773795] [2023-11-12 00:14:06,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610773795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:06,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:06,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:14:06,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760680419] [2023-11-12 00:14:06,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:06,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:14:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:14:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:14:06,617 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) [2023-11-12 00:14:06,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:06,679 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-11-12 00:14:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:14:06,683 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 [2023-11-12 00:14:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:06,690 INFO L225 Difference]: With dead ends: 35 [2023-11-12 00:14:06,690 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 00:14:06,693 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 [2023-11-12 00:14:06,698 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 [2023-11-12 00:14:06,699 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] [2023-11-12 00:14:06,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 00:14:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-12 00:14:06,733 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) [2023-11-12 00:14:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-11-12 00:14:06,736 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 11 [2023-11-12 00:14:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:06,738 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-11-12 00:14:06,738 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) [2023-11-12 00:14:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-11-12 00:14:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:14:06,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:06,740 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] [2023-11-12 00:14:06,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:06,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:14:06,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:06,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash -369278382, now seen corresponding path program 1 times [2023-11-12 00:14:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:06,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061986892] [2023-11-12 00:14:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:06,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:06,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:06,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952744045] [2023-11-12 00:14:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:06,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:06,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:06,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:06,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:14:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:07,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:14:07,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:07,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:07,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:07,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061986892] [2023-11-12 00:14:07,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:07,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952744045] [2023-11-12 00:14:07,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952744045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:07,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:07,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:14:07,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608353263] [2023-11-12 00:14:07,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:14:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:14:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:14:07,223 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:14:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:07,363 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2023-11-12 00:14:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:14:07,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-11-12 00:14:07,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:07,366 INFO L225 Difference]: With dead ends: 51 [2023-11-12 00:14:07,366 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 00:14:07,368 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 [2023-11-12 00:14:07,372 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:07,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 00:14:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-12 00:14:07,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:14:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2023-11-12 00:14:07,394 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 24 [2023-11-12 00:14:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:07,395 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2023-11-12 00:14:07,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:14:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2023-11-12 00:14:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 00:14:07,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:07,403 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:07,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:07,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:07,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:07,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -2038583436, now seen corresponding path program 1 times [2023-11-12 00:14:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:07,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397844939] [2023-11-12 00:14:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:07,630 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:07,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836975906] [2023-11-12 00:14:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:07,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:07,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:07,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:07,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:14:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:07,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:14:07,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:14:07,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:14:07,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397844939] [2023-11-12 00:14:07,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:07,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836975906] [2023-11-12 00:14:07,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836975906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:14:07,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:14:07,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:14:07,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281384583] [2023-11-12 00:14:07,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:14:07,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:14:07,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:14:07,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:14:07,782 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:14:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:07,855 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2023-11-12 00:14:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:14:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-11-12 00:14:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:07,858 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:14:07,858 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 00:14:07,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:14:07,863 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 [2023-11-12 00:14:07,870 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] [2023-11-12 00:14:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 00:14:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-12 00:14:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:14:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-12 00:14:07,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 28 [2023-11-12 00:14:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:07,893 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-12 00:14:07,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:14:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-12 00:14:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 00:14:07,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:07,896 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] [2023-11-12 00:14:07,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:08,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:08,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:08,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:08,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1737391081, now seen corresponding path program 1 times [2023-11-12 00:14:08,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:08,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178761100] [2023-11-12 00:14:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:08,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:08,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:08,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507961964] [2023-11-12 00:14:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:08,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:08,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:08,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:08,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:14:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:08,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:14:08,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:14:08,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:14:08,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:08,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178761100] [2023-11-12 00:14:08,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507961964] [2023-11-12 00:14:08,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507961964] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:08,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [668617131] [2023-11-12 00:14:08,370 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:08,371 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:08,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:08,380 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:08,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:10,128 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:10,130 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-12 00:14:10,137 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:11,592 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '746#(and (= |ULTIMATE.start_main_~temp~0#1| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~row~0#1|) (<= 1 |#StackHeapBarrier|) (<= (* ~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 [2023-11-12 00:14:11,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:11,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:11,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-12 00:14:11,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302502970] [2023-11-12 00:14:11,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:11,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:14:11,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:14:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:14:11,596 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 9 states, 7 states have (on average 3.857142857142857) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:14:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:11,741 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2023-11-12 00:14:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:14:11,742 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 [2023-11-12 00:14:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:11,744 INFO L225 Difference]: With dead ends: 58 [2023-11-12 00:14:11,744 INFO L226 Difference]: Without dead ends: 33 [2023-11-12 00:14:11,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:14:11,750 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:11,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 71 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:14:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-12 00:14:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-12 00:14:11,765 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) [2023-11-12 00:14:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-11-12 00:14:11,767 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 30 [2023-11-12 00:14:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:11,767 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-11-12 00:14:11,767 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) [2023-11-12 00:14:11,768 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-11-12 00:14:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-12 00:14:11,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:11,774 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] [2023-11-12 00:14:11,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:11,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:11,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:11,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash 737507988, now seen corresponding path program 2 times [2023-11-12 00:14:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:11,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139256303] [2023-11-12 00:14:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:11,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:11,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966626428] [2023-11-12 00:14:11,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:14:11,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:11,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:12,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:12,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:14:12,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:14:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:14:12,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 00:14:12,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-12 00:14:12,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:14:12,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139256303] [2023-11-12 00:14:12,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:12,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966626428] [2023-11-12 00:14:12,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966626428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:12,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950595107] [2023-11-12 00:14:12,485 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:12,486 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:12,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:12,486 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:12,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:13,526 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:13,528 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-12 00:14:13,534 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:14,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1114#(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 [2023-11-12 00:14:14,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:14,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:14,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2023-11-12 00:14:14,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880335070] [2023-11-12 00:14:14,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:14:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:14:14,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:14:14,987 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 16 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:14:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:15,173 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2023-11-12 00:14:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:14:15,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2023-11-12 00:14:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:15,175 INFO L225 Difference]: With dead ends: 70 [2023-11-12 00:14:15,176 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 00:14:15,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 00:14:15,177 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:15,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 66 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 00:14:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2023-11-12 00:14:15,186 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) [2023-11-12 00:14:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2023-11-12 00:14:15,188 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 32 [2023-11-12 00:14:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:15,188 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2023-11-12 00:14:15,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 14 states have internal predecessors, (39), 3 states have call successors, (7), 2 states have call predecessors, (7), 7 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-12 00:14:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2023-11-12 00:14:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 00:14:15,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:15,192 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] [2023-11-12 00:14:15,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:15,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:15,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:15,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash -68836906, now seen corresponding path program 3 times [2023-11-12 00:14:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:15,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815676870] [2023-11-12 00:14:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:15,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:15,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:15,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478938118] [2023-11-12 00:14:15,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:14:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:15,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:15,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:14:15,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:14:15,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:14:15,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-12 00:14:15,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:15,956 INFO L351 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 [2023-11-12 00:14:16,011 INFO L351 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 [2023-11-12 00:14:16,172 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:14:16,172 INFO L351 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 [2023-11-12 00:14:16,237 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:14:16,238 INFO L351 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 [2023-11-12 00:14:17,247 INFO L322 Elim1Store]: treesize reduction 208, result has 33.5 percent of original size [2023-11-12 00:14:17,247 INFO L351 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 [2023-11-12 00:14:18,804 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:14:18,805 INFO L351 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 [2023-11-12 00:14:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:14:18,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:19,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815676870] [2023-11-12 00:14:19,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478938118] [2023-11-12 00:14:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478938118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:14:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [212066810] [2023-11-12 00:14:19,784 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:19,784 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:19,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:19,785 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:19,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:20,706 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:20,708 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-12 00:14:20,713 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:23,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1536#(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 [2023-11-12 00:14:23,161 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:23,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:14:23,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-11-12 00:14:23,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565861987] [2023-11-12 00:14:23,162 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:23,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:14:23,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:23,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:14:23,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3215, Unknown=0, NotChecked=0, Total=3540 [2023-11-12 00:14:23,166 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2023-11-12 00:14:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:24,031 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2023-11-12 00:14:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 00:14:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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 [2023-11-12 00:14:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:24,034 INFO L225 Difference]: With dead ends: 101 [2023-11-12 00:14:24,035 INFO L226 Difference]: Without dead ends: 98 [2023-11-12 00:14:24,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=345, Invalid=3437, Unknown=0, NotChecked=0, Total=3782 [2023-11-12 00:14:24,037 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 73 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:24,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 239 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 00:14:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-12 00:14:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2023-11-12 00:14:24,060 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) [2023-11-12 00:14:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2023-11-12 00:14:24,062 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 40 [2023-11-12 00:14:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:24,062 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2023-11-12 00:14:24,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2023-11-12 00:14:24,063 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2023-11-12 00:14:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 00:14:24,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:24,065 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] [2023-11-12 00:14:24,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:24,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:24,271 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:24,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1075120508, now seen corresponding path program 4 times [2023-11-12 00:14:24,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:24,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575144901] [2023-11-12 00:14:24,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:24,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:24,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:24,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677859936] [2023-11-12 00:14:24,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:14:24,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:24,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:24,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:24,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:14:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:24,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:14:24,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 00:14:24,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:14:24,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575144901] [2023-11-12 00:14:24,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677859936] [2023-11-12 00:14:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677859936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:24,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154900510] [2023-11-12 00:14:24,581 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:24,581 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:24,581 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:24,583 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:24,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:25,553 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:25,555 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-12 00:14:25,560 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:26,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2096#(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 [2023-11-12 00:14:26,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:26,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:26,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 00:14:26,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170437581] [2023-11-12 00:14:26,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:26,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:14:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:26,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:14:26,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:14:26,833 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:14:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:27,083 INFO L93 Difference]: Finished difference Result 178 states and 230 transitions. [2023-11-12 00:14:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:14:27,085 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2023-11-12 00:14:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:27,093 INFO L225 Difference]: With dead ends: 178 [2023-11-12 00:14:27,093 INFO L226 Difference]: Without dead ends: 121 [2023-11-12 00:14:27,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:14:27,095 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:27,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 69 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-12 00:14:27,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 96. [2023-11-12 00:14:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 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) [2023-11-12 00:14:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 120 transitions. [2023-11-12 00:14:27,130 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 120 transitions. Word has length 41 [2023-11-12 00:14:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:27,131 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 120 transitions. [2023-11-12 00:14:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:14:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 120 transitions. [2023-11-12 00:14:27,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 00:14:27,133 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:27,133 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] [2023-11-12 00:14:27,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:27,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:27,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:27,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1714144321, now seen corresponding path program 5 times [2023-11-12 00:14:27,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:27,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509426303] [2023-11-12 00:14:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:27,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:27,352 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510633081] [2023-11-12 00:14:27,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:14:27,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:27,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:27,380 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:27,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:14:27,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-12 00:14:27,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:14:27,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:14:27,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:14:27,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 00:14:27,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:27,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509426303] [2023-11-12 00:14:27,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:27,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510633081] [2023-11-12 00:14:27,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510633081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:27,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150276710] [2023-11-12 00:14:27,866 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:27,867 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:27,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:27,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:27,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:28,700 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:28,702 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-12 00:14:28,707 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:30,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2837#(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 [2023-11-12 00:14:30,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:30,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:30,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 00:14:30,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600537791] [2023-11-12 00:14:30,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:30,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:14:30,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:30,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:14:30,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:14:30,070 INFO L87 Difference]: Start difference. First operand 96 states and 120 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) [2023-11-12 00:14:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:30,487 INFO L93 Difference]: Finished difference Result 142 states and 175 transitions. [2023-11-12 00:14:30,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 00:14:30,487 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 41 [2023-11-12 00:14:30,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:30,489 INFO L225 Difference]: With dead ends: 142 [2023-11-12 00:14:30,489 INFO L226 Difference]: Without dead ends: 139 [2023-11-12 00:14:30,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 00:14:30,491 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:30,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 146 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:30,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-12 00:14:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 115. [2023-11-12 00:14:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 88 states have (on average 1.2613636363636365) internal successors, (111), 89 states have internal predecessors, (111), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-12 00:14:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 145 transitions. [2023-11-12 00:14:30,552 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 145 transitions. Word has length 41 [2023-11-12 00:14:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:30,553 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 145 transitions. [2023-11-12 00:14:30,554 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) [2023-11-12 00:14:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 145 transitions. [2023-11-12 00:14:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:14:30,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:30,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:30,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:30,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:30,768 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:30,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:30,768 INFO L85 PathProgramCache]: Analyzing trace with hash 705951226, now seen corresponding path program 1 times [2023-11-12 00:14:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:30,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649636274] [2023-11-12 00:14:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:30,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:30,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:30,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434742164] [2023-11-12 00:14:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:30,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:30,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:30,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:14:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:30,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 00:14:30,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 00:14:31,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:14:31,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649636274] [2023-11-12 00:14:31,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434742164] [2023-11-12 00:14:31,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434742164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:31,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425708860] [2023-11-12 00:14:31,388 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-12 00:14:31,388 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:31,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:31,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:31,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:32,646 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:32,647 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 14 for LOIs [2023-11-12 00:14:32,651 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:34,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3604#(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 [2023-11-12 00:14:34,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:34,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:34,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-11-12 00:14:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670862305] [2023-11-12 00:14:34,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:14:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:34,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:14:34,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2023-11-12 00:14:34,527 INFO L87 Difference]: Start difference. First operand 115 states and 145 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) [2023-11-12 00:14:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:35,105 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2023-11-12 00:14:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 00:14:35,105 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 [2023-11-12 00:14:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:35,106 INFO L225 Difference]: With dead ends: 176 [2023-11-12 00:14:35,107 INFO L226 Difference]: Without dead ends: 127 [2023-11-12 00:14:35,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=348, Invalid=2732, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:14:35,109 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 115 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:35,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 129 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:14:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-12 00:14:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 110. [2023-11-12 00:14:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 86 states have internal predecessors, (106), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:14:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2023-11-12 00:14:35,141 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 44 [2023-11-12 00:14:35,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:35,142 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2023-11-12 00:14:35,142 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) [2023-11-12 00:14:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2023-11-12 00:14:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:14:35,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:35,144 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] [2023-11-12 00:14:35,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:35,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:35,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:35,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:35,350 INFO L85 PathProgramCache]: Analyzing trace with hash 671013880, now seen corresponding path program 6 times [2023-11-12 00:14:35,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:35,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538121068] [2023-11-12 00:14:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:35,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:35,365 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:35,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924082498] [2023-11-12 00:14:35,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:14:35,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:35,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:35,369 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:35,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:14:35,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:14:35,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:14:35,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:14:35,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:14:35,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 00:14:35,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538121068] [2023-11-12 00:14:35,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924082498] [2023-11-12 00:14:35,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924082498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109472529] [2023-11-12 00:14:35,659 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:35,659 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:35,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:35,660 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:35,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:36,446 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:36,448 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-12 00:14:36,453 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:37,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4398#(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 [2023-11-12 00:14:37,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:37,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:37,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-12 00:14:37,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300229696] [2023-11-12 00:14:37,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:14:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:14:37,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:14:37,726 INFO L87 Difference]: Start difference. First operand 110 states and 134 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) [2023-11-12 00:14:38,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:38,029 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2023-11-12 00:14:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 00:14:38,030 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 [2023-11-12 00:14:38,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:38,031 INFO L225 Difference]: With dead ends: 137 [2023-11-12 00:14:38,031 INFO L226 Difference]: Without dead ends: 104 [2023-11-12 00:14:38,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=1634, Unknown=0, NotChecked=0, Total=1892 [2023-11-12 00:14:38,033 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:38,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 84 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-12 00:14:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2023-11-12 00:14:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 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) [2023-11-12 00:14:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2023-11-12 00:14:38,057 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 44 [2023-11-12 00:14:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:38,057 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2023-11-12 00:14:38,057 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) [2023-11-12 00:14:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2023-11-12 00:14:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 00:14:38,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:38,058 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-12 00:14:38,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:38,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:14:38,264 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:38,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 503534232, now seen corresponding path program 7 times [2023-11-12 00:14:38,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:38,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81380910] [2023-11-12 00:14:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:38,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:38,277 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607186874] [2023-11-12 00:14:38,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:14:38,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:38,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:38,279 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:38,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 00:14:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:38,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:14:38,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-12 00:14:38,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:14:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-12 00:14:38,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:14:38,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81380910] [2023-11-12 00:14:38,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:14:38,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607186874] [2023-11-12 00:14:38,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607186874] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:14:38,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1190769021] [2023-11-12 00:14:38,562 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-12 00:14:38,562 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:14:38,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:14:38,563 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:14:38,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:14:39,176 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2023-11-12 00:14:39,178 INFO L197 IcfgInterpreter]: Interpreting procedure outerBoundaryPatternCheck with input of size 16 for LOIs [2023-11-12 00:14:39,182 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:14:40,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5126#(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 [2023-11-12 00:14:40,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:14:40,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:14:40,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-12 00:14:40,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758267831] [2023-11-12 00:14:40,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:14:40,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 00:14:40,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:14:40,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 00:14:40,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 00:14:40,512 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2023-11-12 00:14:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:14:40,786 INFO L93 Difference]: Finished difference Result 158 states and 193 transitions. [2023-11-12 00:14:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:14:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 46 [2023-11-12 00:14:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:14:40,788 INFO L225 Difference]: With dead ends: 158 [2023-11-12 00:14:40,789 INFO L226 Difference]: Without dead ends: 115 [2023-11-12 00:14:40,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2023-11-12 00:14:40,791 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:14:40,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 99 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:14:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-12 00:14:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2023-11-12 00:14:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 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) [2023-11-12 00:14:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2023-11-12 00:14:40,824 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 46 [2023-11-12 00:14:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:14:40,824 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2023-11-12 00:14:40,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2023-11-12 00:14:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2023-11-12 00:14:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 00:14:40,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:14:40,826 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:14:40,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 00:14:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:14:41,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:14:41,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:14:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 172129101, now seen corresponding path program 1 times [2023-11-12 00:14:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:14:41,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576612509] [2023-11-12 00:14:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:14:41,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:14:41,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566442762] [2023-11-12 00:14:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:14:41,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:14:41,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:14:41,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:14:41,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49394ec1-3c17-4bb2-951e-02a2a9b07944/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 00:14:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:14:41,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-12 00:14:41,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:14:41,715 INFO L351 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 [2023-11-12 00:14:41,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 00:14:41,879 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:14:41,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 00:14:41,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:14:41,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 00:14:46,602 INFO L322 Elim1Store]: treesize reduction 70, result has 48.9 percent of original size [2023-11-12 00:14:46,603 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 93