./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.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_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/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_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/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_cf8eb324-70eb-421a-8697-6789d49415e2/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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:51,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:51,387 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:46:51,398 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:51,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:51,446 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:51,447 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:51,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:51,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:51,458 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:51,458 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:51,459 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:51,459 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:51,461 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:51,461 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:51,462 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:51,462 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:51,463 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:51,463 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:51,464 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:51,464 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:51,465 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:51,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:51,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:51,467 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:51,467 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:51,468 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:51,468 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:51,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:51,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:51,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:51,471 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:51,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:51,471 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:51,472 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:51,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:51,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:51,473 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:51,473 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:51,473 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:51,473 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:51,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:51,474 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:51,474 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:51,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:51,475 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_cf8eb324-70eb-421a-8697-6789d49415e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-11-12 00:46:51,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:51,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:51,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:51,766 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:51,766 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:51,768 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-12 00:46:54,879 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:55,180 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:55,180 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-11-12 00:46:55,190 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/data/ad13af3ad/d77434ee7732447b90b3de775cd26b96/FLAGed2c2ed15 [2023-11-12 00:46:55,211 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/data/ad13af3ad/d77434ee7732447b90b3de775cd26b96 [2023-11-12 00:46:55,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:55,223 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:55,225 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:55,225 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:55,231 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:55,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572c0630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55, skipping insertion in model container [2023-11-12 00:46:55,236 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,269 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:55,470 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_cf8eb324-70eb-421a-8697-6789d49415e2/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-11-12 00:46:55,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:55,515 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:55,528 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_cf8eb324-70eb-421a-8697-6789d49415e2/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2023-11-12 00:46:55,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:55,561 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:55,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55 WrapperNode [2023-11-12 00:46:55,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:55,564 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:55,564 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:55,564 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:55,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,612 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 129 [2023-11-12 00:46:55,613 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:55,614 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:55,614 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:55,614 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:55,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,641 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,650 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,658 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:55,662 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:55,662 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:55,663 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:55,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (1/1) ... [2023-11-12 00:46:55,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:55,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:55,713 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:55,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:46:55,756 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:46:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:46:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:55,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-12 00:46:55,760 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-12 00:46:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:55,856 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:55,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:56,115 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:56,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:56,241 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-12 00:46:56,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:56 BoogieIcfgContainer [2023-11-12 00:46:56,247 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:56,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:56,259 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:56,263 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:56,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:55" (1/3) ... [2023-11-12 00:46:56,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63654429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:56, skipping insertion in model container [2023-11-12 00:46:56,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:55" (2/3) ... [2023-11-12 00:46:56,264 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63654429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:56, skipping insertion in model container [2023-11-12 00:46:56,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:56" (3/3) ... [2023-11-12 00:46:56,266 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-11-12 00:46:56,285 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:56,285 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:56,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:56,333 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;@689527ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:56,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:46:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-12 00:46:56,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:56,344 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:56,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:56,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash -492815939, now seen corresponding path program 1 times [2023-11-12 00:46:56,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:56,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449182796] [2023-11-12 00:46:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:46:57,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:57,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449182796] [2023-11-12 00:46:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449182796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:57,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:57,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:46:57,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648006333] [2023-11-12 00:46:57,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:57,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:46:57,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:46:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:46:57,159 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 00:46:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:57,295 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-11-12 00:46:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:46:57,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2023-11-12 00:46:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:57,305 INFO L225 Difference]: With dead ends: 38 [2023-11-12 00:46:57,306 INFO L226 Difference]: Without dead ends: 26 [2023-11-12 00:46:57,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:46:57,313 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:57,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:57,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-12 00:46:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-12 00:46:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:46:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-11-12 00:46:57,351 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 24 [2023-11-12 00:46:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:57,352 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-11-12 00:46:57,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 00:46:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-11-12 00:46:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-12 00:46:57,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:57,355 INFO L195 NwaCegarLoop]: trace histogram [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 00:46:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:46:57,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:57,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1413312325, now seen corresponding path program 1 times [2023-11-12 00:46:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:57,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794014663] [2023-11-12 00:46:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:57,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:46:58,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794014663] [2023-11-12 00:46:58,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794014663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:46:58,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634523044] [2023-11-12 00:46:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:58,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:58,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:58,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:58,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:46:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:58,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-12 00:46:58,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:58,692 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 00:46:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:46:58,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:58,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-12 00:46:58,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-12 00:46:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:46:58,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634523044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:58,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [442160201] [2023-11-12 00:46:58,976 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-12 00:46:58,977 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:58,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:58,987 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:58,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:00,093 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-11-12 00:47:00,126 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-11-12 00:47:00,213 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:01,250 WARN L876 $PredicateComparison]: unable to prove that (and (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (let ((.cse0 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse1 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse2 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse4 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4)) (.cse3 (not (= |c_#Ultimate.meminit_#ptr.base| 0)))) (or (and .cse0 .cse1 .cse2 (exists ((|v_#valid_23| (Array Int Int))) (and (= (select |v_#valid_23| |c_#Ultimate.meminit_#ptr.base|) 0) (= (store |v_#valid_23| |c_#Ultimate.meminit_#ptr.base| 1) |c_#valid|))) .cse3 (exists ((|v_#length_8| (Array Int Int))) (= (store |v_#length_8| |c_#Ultimate.meminit_#ptr.base| .cse4) |c_#length|))) (and .cse0 .cse1 .cse2 (exists ((|v_#valid_23| (Array Int Int)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| Int) (|v_#memory_int_48| (Array Int (Array Int Int))) (|v_#length_8| (Array Int Int))) (let ((.cse5 (store |v_#valid_23| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| 1))) (and (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| 1) |c_#StackHeapBarrier|) (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| 0)) (= (select .cse5 |c_#Ultimate.meminit_#ptr.base|) 0) (= (store (store |v_#length_8| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| .cse4) |c_#Ultimate.meminit_#ptr.base| .cse4) |c_#length|) (= (select |v_#valid_23| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3|) 0) (= |c_#valid| (store .cse5 |c_#Ultimate.meminit_#ptr.base| 1)) (= |c_old(#memory_int)| (store |v_#memory_int_48| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| ((as const (Array Int Int)) 0)))))) .cse3))) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (= |c_#Ultimate.meminit_#sizeOfFields| 4)) is different from true [2023-11-12 00:47:03,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [442160201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:03,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:03,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [11, 10, 8] total 39 [2023-11-12 00:47:03,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420940235] [2023-11-12 00:47:03,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:03,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 00:47:03,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:03,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 00:47:03,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1270, Unknown=5, NotChecked=72, Total=1482 [2023-11-12 00:47:03,847 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:47:08,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:10,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:12,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:16,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:16,747 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2023-11-12 00:47:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 00:47:16,748 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2023-11-12 00:47:16,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:16,750 INFO L225 Difference]: With dead ends: 60 [2023-11-12 00:47:16,750 INFO L226 Difference]: Without dead ends: 53 [2023-11-12 00:47:16,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=188, Invalid=1695, Unknown=13, NotChecked=84, Total=1980 [2023-11-12 00:47:16,752 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 5 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:16,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 136 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 437 Invalid, 7 Unknown, 84 Unchecked, 8.7s Time] [2023-11-12 00:47:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-12 00:47:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2023-11-12 00:47:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 00:47:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2023-11-12 00:47:16,786 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 25 [2023-11-12 00:47:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:16,790 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2023-11-12 00:47:16,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:47:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2023-11-12 00:47:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-12 00:47:16,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:16,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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 00:47:16,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:17,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 00:47:17,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:17,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash -258374616, now seen corresponding path program 1 times [2023-11-12 00:47:17,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:17,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227033998] [2023-11-12 00:47:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:47:17,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227033998] [2023-11-12 00:47:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227033998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361944682] [2023-11-12 00:47:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:17,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:17,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:17,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:47:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:17,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-12 00:47:17,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:17,425 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 00:47:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:47:17,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:17,531 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-12 00:47:17,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-12 00:47:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:47:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361944682] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:17,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766970546] [2023-11-12 00:47:17,615 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-12 00:47:17,615 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:17,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:17,616 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:17,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:18,487 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-11-12 00:47:18,511 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-11-12 00:47:18,547 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:21,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [766970546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:21,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:21,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 10, 8] total 36 [2023-11-12 00:47:21,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31070696] [2023-11-12 00:47:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 00:47:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 00:47:21,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1137, Unknown=7, NotChecked=0, Total=1260 [2023-11-12 00:47:21,440 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:47:24,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:26,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:31,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:31,806 INFO L93 Difference]: Finished difference Result 55 states and 73 transitions. [2023-11-12 00:47:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 00:47:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2023-11-12 00:47:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:31,808 INFO L225 Difference]: With dead ends: 55 [2023-11-12 00:47:31,809 INFO L226 Difference]: Without dead ends: 48 [2023-11-12 00:47:31,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=171, Invalid=1706, Unknown=15, NotChecked=0, Total=1892 [2023-11-12 00:47:31,811 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 11 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:31,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 61 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 328 Invalid, 10 Unknown, 0 Unchecked, 6.9s Time] [2023-11-12 00:47:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-12 00:47:31,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2023-11-12 00:47:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.375) internal successors, (33), 25 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-12 00:47:31,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-11-12 00:47:31,829 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 26 [2023-11-12 00:47:31,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:31,829 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-11-12 00:47:31,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:47:31,830 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-12 00:47:31,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-12 00:47:31,831 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:31,831 INFO L195 NwaCegarLoop]: trace histogram [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 00:47:31,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:47:32,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:32,037 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:32,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash -555103749, now seen corresponding path program 1 times [2023-11-12 00:47:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:32,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885246210] [2023-11-12 00:47:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:47:32,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:32,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885246210] [2023-11-12 00:47:32,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885246210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:32,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881287063] [2023-11-12 00:47:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:32,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:32,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:32,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:32,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:47:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:32,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:47:32,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:47:32,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:47:32,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881287063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:32,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590142251] [2023-11-12 00:47:32,395 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-12 00:47:32,396 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:32,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:32,396 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:32,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:32,940 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-11-12 00:47:32,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-11-12 00:47:33,016 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:35,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1590142251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:35,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:35,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 5, 5] total 30 [2023-11-12 00:47:35,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837705409] [2023-11-12 00:47:35,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:35,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:47:35,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:47:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=782, Unknown=8, NotChecked=0, Total=870 [2023-11-12 00:47:35,207 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:47:39,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:41,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:43,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:45,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:46,003 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse10 (select |c_#memory_int| 1))) (and (let ((.cse0 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse1 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse2 (exists ((|v_#valid_27| (Array Int Int))) (let ((.cse9 (store |v_#valid_27| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= |c_#valid| (store .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)) (= (select |v_#valid_27| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0) (= (select .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0))))) (.cse3 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse4 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse6 ((as const (Array Int Int)) 0)) (.cse7 (exists ((|v_#length_12| (Array Int Int))) (= |c_#length| (let ((.cse8 (* (mod |c_ULTIMATE.start_main_~n~0#1| 1073741824) 4))) (store (store |v_#length_12| |c_ULTIMATE.start_main_#t~malloc15#1.base| .cse8) |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse8)))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (exists ((|v_#memory_int_82| (Array Int (Array Int Int)))) (= (store |v_#memory_int_82| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse6) |c_#memory_int|)) .cse7) (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (exists ((|v_#memory_int_80| (Array Int (Array Int Int)))) (= (store |v_#memory_int_80| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse6) |c_#memory_int|)) .cse7))) (= (select |c_#valid| 0) 0) (= (select |c_#valid| 3) 1) (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= 2 (select |c_#length| 1)) (= (select |c_#valid| 1) 1) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= (select |c_#length| 2) 17) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (= (select |c_#valid| 2) 1) (= (select .cse10 1) 0) (<= 0 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~a0~0#1.offset| 0) (= (select |c_#length| 3) 12) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 48 (select .cse10 0)) (<= 0 |c_ULTIMATE.start_main_~i~1#1|))) is different from true [2023-11-12 00:47:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:46,376 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2023-11-12 00:47:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-12 00:47:46,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-11-12 00:47:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:46,378 INFO L225 Difference]: With dead ends: 67 [2023-11-12 00:47:46,379 INFO L226 Difference]: Without dead ends: 58 [2023-11-12 00:47:46,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=111, Invalid=1068, Unknown=15, NotChecked=66, Total=1260 [2023-11-12 00:47:46,381 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 5 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:46,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 198 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 684 Invalid, 9 Unknown, 19 Unchecked, 9.5s Time] [2023-11-12 00:47:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-12 00:47:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2023-11-12 00:47:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-12 00:47:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2023-11-12 00:47:46,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 27 [2023-11-12 00:47:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:46,407 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2023-11-12 00:47:46,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:47:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2023-11-12 00:47:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 00:47:46,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:46,408 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:47:46,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:47:46,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:46,613 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:46,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash -728485346, now seen corresponding path program 1 times [2023-11-12 00:47:46,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:46,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413074162] [2023-11-12 00:47:46,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:46,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:47:46,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413074162] [2023-11-12 00:47:46,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413074162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:47:46,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468985961] [2023-11-12 00:47:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:46,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:47:46,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:47:46,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:47:46,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8eb324-70eb-421a-8697-6789d49415e2/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:47:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:46,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:47:46,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:47:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:47:46,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:47:46,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468985961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:46,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243275579] [2023-11-12 00:47:46,968 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-12 00:47:46,968 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:46,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:46,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:46,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:47,475 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-11-12 00:47:47,492 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-11-12 00:47:47,531 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:49,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1243275579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:49,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:47:49,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 5, 5] total 30 [2023-11-12 00:47:49,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661903473] [2023-11-12 00:47:49,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:49,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:47:49,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:49,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:47:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=789, Unknown=5, NotChecked=0, Total=870 [2023-11-12 00:47:49,609 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 00:47:52,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:47:55,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]