./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum05.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:20:13,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:20:13,350 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:20:13,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:20:13,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:20:13,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:20:13,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:20:13,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:20:13,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:20:13,383 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:20:13,383 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:20:13,384 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:20:13,385 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:20:13,386 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:20:13,386 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:20:13,387 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:20:13,388 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:20:13,388 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:20:13,389 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:20:13,390 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:20:13,390 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:20:13,391 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:20:13,392 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:20:13,393 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:20:13,393 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:20:13,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:20:13,394 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:20:13,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:20:13,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:20:13,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:20:13,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:20:13,397 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:20:13,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:20:13,398 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:20:13,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:20:13,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:20:13,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:20:13,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:20:13,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:20:13,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:20:13,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:20:13,401 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:20:13,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:20:13,401 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:20:13,401 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:20:13,402 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:20:13,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:20:13,402 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_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aee69f990ab81a58f1fe8cd275c8a09f43ca6a442f73810f885d3d0c9a85d2b3 [2023-11-23 21:20:13,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:20:13,774 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:20:13,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:20:13,779 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:20:13,780 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:20:13,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/reducercommutativity/rangesum05.i [2023-11-23 21:20:16,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:20:17,207 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:20:17,208 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/sv-benchmarks/c/reducercommutativity/rangesum05.i [2023-11-23 21:20:17,215 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/data/caaa5ddba/4df47416f0de4e49a4c4dc911aeafcae/FLAG3e789bfd2 [2023-11-23 21:20:17,231 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/data/caaa5ddba/4df47416f0de4e49a4c4dc911aeafcae [2023-11-23 21:20:17,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:20:17,235 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:20:17,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:20:17,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:20:17,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:20:17,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283338a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17, skipping insertion in model container [2023-11-23 21:20:17,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,269 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:20:17,436 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_ae4b29c7-241d-4ad3-9a21-7217fee854d4/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2023-11-23 21:20:17,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:20:17,450 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:20:17,474 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_ae4b29c7-241d-4ad3-9a21-7217fee854d4/sv-benchmarks/c/reducercommutativity/rangesum05.i[1457,1470] [2023-11-23 21:20:17,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:20:17,490 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:20:17,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17 WrapperNode [2023-11-23 21:20:17,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:20:17,493 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:20:17,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:20:17,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:20:17,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,528 INFO L138 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2023-11-23 21:20:17,529 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:20:17,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:20:17,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:20:17,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:20:17,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,557 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,559 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:20:17,568 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:20:17,568 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:20:17,568 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:20:17,569 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (1/1) ... [2023-11-23 21:20:17,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:20:17,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:17,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:20:17,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:20:17,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:20:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:20:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:20:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:20:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:20:17,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:20:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:20:17,649 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2023-11-23 21:20:17,649 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2023-11-23 21:20:17,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:20:17,727 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:20:17,729 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:20:17,918 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:20:18,001 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:20:18,001 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:20:18,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:18 BoogieIcfgContainer [2023-11-23 21:20:18,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:20:18,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:20:18,006 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:20:18,010 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:20:18,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:20:17" (1/3) ... [2023-11-23 21:20:18,011 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea4b731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:18, skipping insertion in model container [2023-11-23 21:20:18,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:20:17" (2/3) ... [2023-11-23 21:20:18,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea4b731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:20:18, skipping insertion in model container [2023-11-23 21:20:18,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:20:18" (3/3) ... [2023-11-23 21:20:18,013 INFO L112 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2023-11-23 21:20:18,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:20:18,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:20:18,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:20:18,092 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;@530f596e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:20:18,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:20:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:20:18,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:20:18,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:18,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:18,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:18,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash -362891911, now seen corresponding path program 1 times [2023-11-23 21:20:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:18,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579152694] [2023-11-23 21:20:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:18,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:18,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:18,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579152694] [2023-11-23 21:20:18,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:20:18,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261027186] [2023-11-23 21:20:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:18,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:18,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:18,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:18,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:20:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:18,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:18,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:20:18,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:18,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261027186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:18,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:18,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:20:18,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249583880] [2023-11-23 21:20:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:18,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:18,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:18,580 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:20:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:18,624 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-23 21:20:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-11-23 21:20:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:18,632 INFO L225 Difference]: With dead ends: 33 [2023-11-23 21:20:18,633 INFO L226 Difference]: Without dead ends: 16 [2023-11-23 21:20:18,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:18,640 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:18,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-23 21:20:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-23 21:20:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:20:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-23 21:20:18,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 20 [2023-11-23 21:20:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:18,679 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-23 21:20:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:20:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-23 21:20:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:20:18,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:18,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:18,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:20:18,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:20:18,898 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:18,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1643744981, now seen corresponding path program 1 times [2023-11-23 21:20:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:18,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951885586] [2023-11-23 21:20:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:18,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:18,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951885586] [2023-11-23 21:20:18,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:20:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79059215] [2023-11-23 21:20:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:18,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:18,952 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:18,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:20:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:19,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:19,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:20:19,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:19,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79059215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:19,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:19,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:20:19,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819294967] [2023-11-23 21:20:19,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:19,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:19,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:19,057 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:20:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:19,081 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2023-11-23 21:20:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-23 21:20:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:19,083 INFO L225 Difference]: With dead ends: 29 [2023-11-23 21:20:19,083 INFO L226 Difference]: Without dead ends: 17 [2023-11-23 21:20:19,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:19,086 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:19,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-23 21:20:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-23 21:20:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:20:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-23 21:20:19,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 21 [2023-11-23 21:20:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:19,094 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-23 21:20:19,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:20:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-23 21:20:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:20:19,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:19,096 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:19,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:19,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:19,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash 367287681, now seen corresponding path program 1 times [2023-11-23 21:20:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:19,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453456169] [2023-11-23 21:20:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:19,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:19,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453456169] [2023-11-23 21:20:19,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:20:19,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842555766] [2023-11-23 21:20:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:19,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:19,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:19,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:20:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:19,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:20:19,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:20:19,497 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:19,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842555766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:19,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:19,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:20:19,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84041169] [2023-11-23 21:20:19,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:19,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:19,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:19,504 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:20:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:19,537 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-23 21:20:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-23 21:20:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:19,539 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:20:19,539 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 21:20:19,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:19,544 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:19,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 21:20:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-23 21:20:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:20:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-23 21:20:19,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 24 [2023-11-23 21:20:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:19,564 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-23 21:20:19,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:20:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-23 21:20:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 21:20:19,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:19,566 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:19,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:19,788 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:19,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash 269819910, now seen corresponding path program 1 times [2023-11-23 21:20:19,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:19,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868501130] [2023-11-23 21:20:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:19,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:19,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868501130] [2023-11-23 21:20:19,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 21:20:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301950623] [2023-11-23 21:20:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:19,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:19,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:19,835 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:19,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:20:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:19,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:20:19,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 21:20:19,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:20:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 21:20:20,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301950623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:20:20,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381189634] [2023-11-23 21:20:20,079 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:20:20,079 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:20:20,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:20:20,089 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:20:20,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:20:28,192 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 10 for LOIs [2023-11-23 21:20:28,595 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:20:52,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '574#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (or (and (exists ((|v_#memory_int_42| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base|) 16 |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_5 Int) (v_rangesum_~ret~0_BEFORE_RETURN_5 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_5) (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_5 0)) (or (and (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 4294967296)) (or (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0) (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_5 1)))) (and (or (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0) (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_5 1))) (= |ULTIMATE.start_main_~ret5~0#1| (mod (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 4294967296))) (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 0)) (<= (+ v_rangesum_~ret~0_BEFORE_RETURN_5 1) 0) (or (= |ULTIMATE.start_main_~ret5~0#1| (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1) 4294967296)) (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_5 v_rangesum_~cnt~0_BEFORE_RETURN_5) 1) 4294967296)))))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_5 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)))))) (and (exists ((|v_#memory_int_42| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_42| |ULTIMATE.start_main_~#x~0#1.base|) 16 |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_6 Int) (v_rangesum_~ret~0_BEFORE_RETURN_6 Int)) (and (or (and (not (= v_rangesum_~cnt~0_BEFORE_RETURN_6 0)) (or (and (or (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_6 1)) (= (mod v_rangesum_~ret~0_BEFORE_RETURN_6 v_rangesum_~cnt~0_BEFORE_RETURN_6) 0)) (= |ULTIMATE.start_main_~ret5~0#1| (mod (div v_rangesum_~ret~0_BEFORE_RETURN_6 v_rangesum_~cnt~0_BEFORE_RETURN_6) 4294967296))) (and (<= (+ v_rangesum_~ret~0_BEFORE_RETURN_6 1) 0) (or (= |ULTIMATE.start_main_~ret5~0#1| (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_6 v_rangesum_~cnt~0_BEFORE_RETURN_6) 1) 4294967296)) (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_6 v_rangesum_~cnt~0_BEFORE_RETURN_6) 1) 4294967296))) (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_6 v_rangesum_~cnt~0_BEFORE_RETURN_6) 0))) (and (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod (div v_rangesum_~ret~0_BEFORE_RETURN_6 v_rangesum_~cnt~0_BEFORE_RETURN_6) 4294967296)) (or (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_6 1)) (= (mod v_rangesum_~ret~0_BEFORE_RETURN_6 v_rangesum_~cnt~0_BEFORE_RETURN_6) 0))))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_6 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_6))))) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-11-23 21:20:52,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:20:52,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:20:52,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2023-11-23 21:20:52,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944915097] [2023-11-23 21:20:52,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:20:52,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:20:52,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:52,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:20:52,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=263, Unknown=15, NotChecked=0, Total=342 [2023-11-23 21:20:52,689 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:20:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:52,733 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2023-11-23 21:20:52,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:20:52,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 25 [2023-11-23 21:20:52,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:52,734 INFO L225 Difference]: With dead ends: 36 [2023-11-23 21:20:52,734 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 21:20:52,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=64, Invalid=263, Unknown=15, NotChecked=0, Total=342 [2023-11-23 21:20:52,737 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:52,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 21:20:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 21:20:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:20:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-23 21:20:52,743 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-11-23 21:20:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:52,743 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-23 21:20:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:20:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-23 21:20:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:20:52,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:52,745 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:52,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:52,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:52,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:52,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash -815879724, now seen corresponding path program 2 times [2023-11-23 21:20:52,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:52,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887404194] [2023-11-23 21:20:52,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:52,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:53,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:20:53,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455163760] [2023-11-23 21:20:53,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:20:53,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:53,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:53,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:53,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:20:53,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:20:53,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:20:53,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:20:53,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 21:20:53,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:20:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 21:20:53,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:53,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887404194] [2023-11-23 21:20:53,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:20:53,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455163760] [2023-11-23 21:20:53,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455163760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:20:53,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425243906] [2023-11-23 21:20:53,145 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:20:53,145 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:20:53,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:20:53,145 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:20:53,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:20:58,068 INFO L197 IcfgInterpreter]: Interpreting procedure rangesum with input of size 10 for LOIs [2023-11-23 21:20:58,371 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:21:15,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '846#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (or (and (exists ((|v_#memory_int_50| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_50| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_50| |ULTIMATE.start_main_~#x~0#1.base|) 16 |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_rangesum_~ret~0_BEFORE_RETURN_12 Int) (v_rangesum_~cnt~0_BEFORE_RETURN_12 Int)) (and (or (and (or (and (= (mod (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (or (= (mod v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 0) (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_12 1)))) (and (= |ULTIMATE.start_main_~ret5~0#1| (mod (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 4294967296)) (or (= (mod v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 0) (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_12 1)))) (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 0)) (or (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 1) 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_12 v_rangesum_~cnt~0_BEFORE_RETURN_12) 1) 4294967296))) (<= (+ v_rangesum_~ret~0_BEFORE_RETURN_12 1) 0))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_12 0))) (and (= v_rangesum_~cnt~0_BEFORE_RETURN_12 0) (= |ULTIMATE.start_main_~ret5~0#1| 0))) (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_12)))) (and (exists ((|v_#memory_int_50| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_50| |ULTIMATE.start_main_~#x~0#1.base| (store (select |v_#memory_int_50| |ULTIMATE.start_main_~#x~0#1.base|) 16 |ULTIMATE.start_main_~temp~0#1|)))) (exists ((v_rangesum_~cnt~0_BEFORE_RETURN_11 Int) (v_rangesum_~ret~0_BEFORE_RETURN_11 Int)) (and (<= 0 v_rangesum_~cnt~0_BEFORE_RETURN_11) (or (and (= v_rangesum_~cnt~0_BEFORE_RETURN_11 0) (= |ULTIMATE.start_main_~ret5~0#1| 0)) (and (or (and (= |ULTIMATE.start_main_~ret5~0#1| (mod (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 4294967296)) (or (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_11 1)) (= (mod v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 0))) (and (= (mod (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 4294967296) (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296)) (or (< 0 (+ v_rangesum_~ret~0_BEFORE_RETURN_11 1)) (= (mod v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 0))) (and (not (= (mod v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 0)) (or (= (+ |ULTIMATE.start_main_~ret5~0#1| 4294967296) (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 1) 4294967296)) (= |ULTIMATE.start_main_~ret5~0#1| (mod (+ (div v_rangesum_~ret~0_BEFORE_RETURN_11 v_rangesum_~cnt~0_BEFORE_RETURN_11) 1) 4294967296))) (<= (+ v_rangesum_~ret~0_BEFORE_RETURN_11 1) 0))) (not (= v_rangesum_~cnt~0_BEFORE_RETURN_11 0)))))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647))' at error location [2023-11-23 21:21:15,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:21:15,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:21:15,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-23 21:21:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571168118] [2023-11-23 21:21:15,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 21:21:15,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:21:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:21:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:21:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=261, Unknown=17, NotChecked=0, Total=342 [2023-11-23 21:21:15,820 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:21:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:21:15,853 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-23 21:21:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:21:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-23 21:21:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:21:15,854 INFO L225 Difference]: With dead ends: 38 [2023-11-23 21:21:15,854 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 21:21:15,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=64, Invalid=261, Unknown=17, NotChecked=0, Total=342 [2023-11-23 21:21:15,856 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:21:15,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:21:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 21:21:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 21:21:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:21:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-23 21:21:15,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2023-11-23 21:21:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:21:15,862 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-23 21:21:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:21:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-23 21:21:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:21:15,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:21:15,864 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:21:15,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:21:16,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:16,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:21:16,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:21:16,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1105412936, now seen corresponding path program 3 times [2023-11-23 21:21:16,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:21:16,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554397979] [2023-11-23 21:21:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:21:16,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:21:16,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:21:16,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232383255] [2023-11-23 21:21:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:21:16,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:21:16,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:21:16,100 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:21:16,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae4b29c7-241d-4ad3-9a21-7217fee854d4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:21:16,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:21:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:21:16,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:21:16,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:21:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:21:16,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:21:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:21:16,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:21:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554397979] [2023-11-23 21:21:16,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:21:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232383255] [2023-11-23 21:21:16,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232383255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:21:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765070592] [2023-11-23 21:21:16,300 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:21:16,300 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:21:16,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:21:16,301 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:21:16,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs