./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.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_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/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_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/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_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:53,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:54,078 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:12:54,088 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:54,089 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:54,133 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:54,133 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:54,134 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:54,135 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:54,142 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:54,143 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:54,143 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:54,144 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:54,146 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:54,146 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:54,147 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:54,147 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:54,147 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:54,148 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:54,148 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:54,149 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:54,155 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:54,157 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:54,157 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:12:54,158 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:12:54,158 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:54,159 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:12:54,159 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:54,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:12:54,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:54,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:12:54,177 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:12:54,177 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:12:54,178 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:54,178 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:54,178 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:54,179 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:54,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:54,179 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:54,180 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:54,180 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:12:54,180 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:54,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:54,181 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:54,181 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:12:54,182 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:54,182 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:54,182 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_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2023-11-23 21:12:54,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:54,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:54,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:54,533 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:54,534 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:54,535 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2023-11-23 21:12:57,778 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:58,044 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:58,048 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2023-11-23 21:12:58,057 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/data/e715894c3/15990df178474b1e9493fe833467df99/FLAG4cdba860a [2023-11-23 21:12:58,079 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/data/e715894c3/15990df178474b1e9493fe833467df99 [2023-11-23 21:12:58,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:58,086 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:58,088 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:58,088 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:58,094 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:58,095 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d352a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58, skipping insertion in model container [2023-11-23 21:12:58,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,123 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:58,315 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_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-11-23 21:12:58,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:58,344 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:58,360 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_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2023-11-23 21:12:58,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:58,398 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:58,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58 WrapperNode [2023-11-23 21:12:58,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:58,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:58,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:58,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:58,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,416 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,441 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2023-11-23 21:12:58,442 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:58,443 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:58,443 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:58,443 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:58,453 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,464 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,481 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:58,482 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:58,482 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:58,483 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:58,483 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (1/1) ... [2023-11-23 21:12:58,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:58,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:58,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:58,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:58,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:58,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:12:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:12:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:58,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:12:58,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:12:58,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:12:58,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:12:58,641 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:58,644 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:58,789 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:58,856 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:58,856 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:12:58,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:58 BoogieIcfgContainer [2023-11-23 21:12:58,858 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:58,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:58,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:58,865 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:58,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:58" (1/3) ... [2023-11-23 21:12:58,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74603529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:58, skipping insertion in model container [2023-11-23 21:12:58,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:58" (2/3) ... [2023-11-23 21:12:58,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74603529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:58, skipping insertion in model container [2023-11-23 21:12:58,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:58" (3/3) ... [2023-11-23 21:12:58,868 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2023-11-23 21:12:58,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:58,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:12:58,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:58,942 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;@5424a1f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:58,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:12:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:12:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:12:58,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:58,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:58,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:58,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:58,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1269016545, now seen corresponding path program 1 times [2023-11-23 21:12:58,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999359597] [2023-11-23 21:12:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:58,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:59,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:59,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:59,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999359597] [2023-11-23 21:12:59,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999359597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:59,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:59,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:59,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018948709] [2023-11-23 21:12:59,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:59,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:59,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:59,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:59,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:59,483 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:59,564 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2023-11-23 21:12:59,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:12:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:59,575 INFO L225 Difference]: With dead ends: 36 [2023-11-23 21:12:59,575 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 21:12:59,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 21:12:59,585 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:59,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 21:12:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-11-23 21:12:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:12:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-23 21:12:59,640 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2023-11-23 21:12:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:59,641 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-23 21:12:59,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-23 21:12:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:12:59,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:59,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:59,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:59,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:59,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:59,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1475863465, now seen corresponding path program 1 times [2023-11-23 21:12:59,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:59,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010768122] [2023-11-23 21:12:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:59,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:59,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010768122] [2023-11-23 21:12:59,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010768122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:59,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106944416] [2023-11-23 21:12:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:59,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:59,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:59,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:12:59,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:59,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:12:59,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:59,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:13:00,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:00,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:00,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-11-23 21:13:00,390 INFO L378 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 26 treesize of output 24 [2023-11-23 21:13:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:00,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106944416] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:00,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952494562] [2023-11-23 21:13:00,471 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-23 21:13:00,471 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:00,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:00,481 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:00,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:00,756 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 31 for LOIs [2023-11-23 21:13:00,797 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:01,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '157#(and (exists ((|v_ULTIMATE.start_main_~index~0#1_39| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~index~0#1_39|) (not (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) 0) 4294967296) 0)) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_39| 4294967296)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 21:13:01,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:13:01,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 8] total 13 [2023-11-23 21:13:01,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086218545] [2023-11-23 21:13:01,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:13:01,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:13:01,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:13:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:13:01,196 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:13:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:01,523 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-11-23 21:13:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:13:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:13:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:01,525 INFO L225 Difference]: With dead ends: 47 [2023-11-23 21:13:01,525 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 21:13:01,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:13:01,528 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:01,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 64 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:13:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 21:13:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2023-11-23 21:13:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:13:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-23 21:13:01,539 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2023-11-23 21:13:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:01,540 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-23 21:13:01,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:13:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-23 21:13:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:13:01,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:01,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:01,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:01,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:01,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:01,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash -428559622, now seen corresponding path program 1 times [2023-11-23 21:13:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:01,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918061508] [2023-11-23 21:13:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:13:02,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:02,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918061508] [2023-11-23 21:13:02,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918061508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:02,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66892005] [2023-11-23 21:13:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:02,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:02,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:02,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:02,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:13:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:02,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:13:02,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:02,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:13:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:02,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:04,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 21:13:04,863 INFO L378 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 30 treesize of output 26 [2023-11-23 21:13:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:04,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66892005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:04,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126170182] [2023-11-23 21:13:04,937 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-23 21:13:04,937 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:04,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:04,938 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:04,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:05,724 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 114 for LOIs [2023-11-23 21:13:06,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:12,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '401#(and (or (exists ((|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_#t~mem4#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_6| Int)) (and (= (mod |v_ULTIMATE.start_main_#t~mem4#1_BEFORE_CALL_2| 4294967296) 0) (exists ((|v_ULTIMATE.start_main_~index~0#1_49| Int)) (and (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_49| 4294967296)) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) (<= 0 |v_ULTIMATE.start_main_~index~0#1_49|))) (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_6| 1) (= |v_ULTIMATE.start_main_#t~mem4#1_BEFORE_CALL_2| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) 4)) (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_6| 0) (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) 0) 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7| Int)) (and (= |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_5| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|) 0)) (not (= (mod |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_5| 4294967296) 0)) (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_7| 0) (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_7| 0) (exists ((|v_ULTIMATE.start_main_~index~0#1_49| Int)) (and (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_49| 4294967296)) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|) (<= 1 |v_ULTIMATE.start_main_~index~0#1_49|)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 21:13:12,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:13:12,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:12,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 11] total 19 [2023-11-23 21:13:12,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45892565] [2023-11-23 21:13:12,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:13:12,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:13:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:12,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:13:12,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=692, Unknown=2, NotChecked=0, Total=812 [2023-11-23 21:13:12,630 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:13:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:14,421 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2023-11-23 21:13:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:13:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-11-23 21:13:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:14,424 INFO L225 Difference]: With dead ends: 71 [2023-11-23 21:13:14,424 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:13:14,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=212, Invalid=1192, Unknown=2, NotChecked=0, Total=1406 [2023-11-23 21:13:14,427 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:14,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 96 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:13:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:13:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2023-11-23 21:13:14,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:13:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-23 21:13:14,442 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2023-11-23 21:13:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:14,442 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-23 21:13:14,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:13:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-23 21:13:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:13:14,444 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:14,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:14,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 21:13:14,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:14,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:14,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2060334989, now seen corresponding path program 1 times [2023-11-23 21:13:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:14,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725471613] [2023-11-23 21:13:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:14,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:13:14,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725471613] [2023-11-23 21:13:14,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725471613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:14,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267314958] [2023-11-23 21:13:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:14,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:14,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:13:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:15,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 21:13:15,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:15,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 21:13:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:13:15,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:16,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-23 21:13:16,718 INFO L378 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 28 treesize of output 24 [2023-11-23 21:13:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:13:17,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267314958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:17,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169457814] [2023-11-23 21:13:17,053 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:13:17,053 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:17,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:17,054 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:17,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:18,090 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 85 for LOIs [2023-11-23 21:13:18,297 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:25,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (or (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_15| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_29| Int)) (and (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_29| 0) (= |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_15| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_29|) (* (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 4294967296) 4))) (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 2) 0) (or (and (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 0) (exists ((|v_ULTIMATE.start_main_~index~0#1_65| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_65| 4294967296)) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_29|) (<= 1 |v_ULTIMATE.start_main_~index~0#1_65|)))) (and (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29|) (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_29| 4294967296) 999))) (not (= (mod |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_15| 4294967296) 0)))) (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| 2) 0)) (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26|) (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| 4294967296) 999) (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_26|) (* (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_26| 4294967296) 4)) 4294967296) 0)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 21:13:25,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:13:25,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:25,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 13] total 23 [2023-11-23 21:13:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657792477] [2023-11-23 21:13:25,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:13:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 21:13:25,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:25,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 21:13:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=984, Unknown=2, NotChecked=0, Total=1122 [2023-11-23 21:13:25,906 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 23 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:13:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:29,108 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2023-11-23 21:13:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 21:13:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2023-11-23 21:13:29,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:29,113 INFO L225 Difference]: With dead ends: 102 [2023-11-23 21:13:29,114 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 21:13:29,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=330, Invalid=2118, Unknown=2, NotChecked=0, Total=2450 [2023-11-23 21:13:29,118 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:29,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 145 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:13:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 21:13:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2023-11-23 21:13:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-23 21:13:29,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2023-11-23 21:13:29,149 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 29 [2023-11-23 21:13:29,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:29,149 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2023-11-23 21:13:29,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-23 21:13:29,150 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2023-11-23 21:13:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:13:29,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:29,152 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:29,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:29,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:29,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:29,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -716203426, now seen corresponding path program 2 times [2023-11-23 21:13:29,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:29,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375871261] [2023-11-23 21:13:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:13:29,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375871261] [2023-11-23 21:13:29,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375871261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:29,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604722168] [2023-11-23 21:13:29,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:13:29,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:29,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:29,632 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:29,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:13:29,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:13:29,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:13:29,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:13:29,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:13:29,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:13:30,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604722168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:30,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1561372992] [2023-11-23 21:13:30,080 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:13:30,080 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:30,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:30,081 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:30,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:30,936 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 85 for LOIs [2023-11-23 21:13:31,126 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:38,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1285#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_44| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_44| 2) 0)) (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_44|) (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_44| 4294967296) 999) (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_44|) (* 4 (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_44| 4294967296))) 4294967296) 0))) (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_47| Int) (|v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_24| Int)) (and (or (and (exists ((|v_ULTIMATE.start_main_~index~0#1_85| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_47|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~index~0#1_85|) (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_85| 4294967296)))) (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_47| 0)) (and (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_47| 4294967296) 999) (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_47|))) (not (= (mod |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_24| 4294967296) 0)) (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_47| 2) 0) (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_47| 0) (= |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_24| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_47|) (* (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_47| 4294967296) 4)))))))' at error location [2023-11-23 21:13:38,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:13:38,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:38,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2023-11-23 21:13:38,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600890530] [2023-11-23 21:13:38,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:13:38,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:13:38,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:38,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:13:38,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=447, Unknown=2, NotChecked=0, Total=552 [2023-11-23 21:13:38,360 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:13:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:39,350 INFO L93 Difference]: Finished difference Result 161 states and 202 transitions. [2023-11-23 21:13:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:13:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2023-11-23 21:13:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:39,354 INFO L225 Difference]: With dead ends: 161 [2023-11-23 21:13:39,354 INFO L226 Difference]: Without dead ends: 104 [2023-11-23 21:13:39,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=156, Invalid=598, Unknown=2, NotChecked=0, Total=756 [2023-11-23 21:13:39,357 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:39,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 109 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:13:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-23 21:13:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 68. [2023-11-23 21:13:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-23 21:13:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-11-23 21:13:39,392 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 39 [2023-11-23 21:13:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:39,392 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-11-23 21:13:39,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:13:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-11-23 21:13:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:13:39,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:39,395 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:39,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 21:13:39,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:39,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:39,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash 717006174, now seen corresponding path program 3 times [2023-11-23 21:13:39,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:39,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227682208] [2023-11-23 21:13:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:39,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:13:40,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:40,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227682208] [2023-11-23 21:13:40,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227682208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:40,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536798133] [2023-11-23 21:13:40,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:13:40,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:40,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:40,357 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:40,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb0ecf8a-fe9b-4f43-b8bb-231aacf3cfc8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:13:40,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:13:40,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:13:40,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:13:40,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:13:40,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:13:41,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536798133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:41,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659005218] [2023-11-23 21:13:41,366 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 21:13:41,366 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:41,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:41,367 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:41,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:42,029 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 85 for LOIs [2023-11-23 21:13:42,159 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:49,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1920#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (or (exists ((|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_65| Int) (|v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_65| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_65| Int) (|v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_33| Int)) (and (or (and (= |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_65| 0) (exists ((|v_ULTIMATE.start_main_~index~0#1_117| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_65|) (<= 1000 (mod |v_ULTIMATE.start_main_~index~0#1_117| 4294967296)) (<= 1 |v_ULTIMATE.start_main_~index~0#1_117|)))) (and (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_65| 4294967296) 999) (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_65|))) (= |v_ULTIMATE.start_main_~#array~0#1.offset_BEFORE_CALL_65| 0) (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_65| 2) 0) (= |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_33| (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_65|) (* (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_65| 4294967296) 4))) (not (= (mod |v_ULTIMATE.start_main_#t~mem3#1_BEFORE_CALL_33| 4294967296) 0)))) (exists ((|v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_62| Int) (|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_62| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_62| 2) 0)) (= 0 (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_62|) (* (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_62| 4294967296) 4)) 4294967296)) (<= (mod |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_62| 4294967296) 999) (<= 1 |v_ULTIMATE.start_main_~index~0#1_BEFORE_CALL_62|)))))' at error location [2023-11-23 21:13:49,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:13:49,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:49,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2023-11-23 21:13:49,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519105309] [2023-11-23 21:13:49,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:13:49,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 21:13:49,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 21:13:49,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1023, Unknown=2, NotChecked=0, Total=1260 [2023-11-23 21:13:49,414 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)