./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh --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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:33:21,425 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:33:21,501 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:33:21,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:33:21,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:33:21,540 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:33:21,541 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:33:21,541 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:33:21,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:33:21,543 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:33:21,543 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:33:21,544 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:33:21,545 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:33:21,545 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:33:21,546 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:33:21,546 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:33:21,547 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:33:21,547 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:33:21,548 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:33:21,548 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:33:21,549 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:33:21,550 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:33:21,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:33:21,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:33:21,552 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:33:21,552 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:33:21,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:33:21,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:33:21,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:33:21,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:33:21,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:33:21,555 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:33:21,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:33:21,556 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:33:21,557 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:33:21,557 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:33:21,558 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:33:21,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:33:21,559 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:33:21,559 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:33:21,559 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:33:21,560 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:33:21,560 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:33:21,560 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:33:21,560 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:33:21,561 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:33:21,561 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:33:21,561 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_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2023-12-02 13:33:21,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:33:21,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:33:21,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:33:21,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:33:21,863 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:33:21,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-12-02 13:33:25,005 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:33:25,204 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:33:25,204 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2023-12-02 13:33:25,211 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/data/99e447334/2ba6b432102b4de0957caaf78945093f/FLAG5236c5a0e [2023-12-02 13:33:25,226 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/data/99e447334/2ba6b432102b4de0957caaf78945093f [2023-12-02 13:33:25,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:33:25,231 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:33:25,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:33:25,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:33:25,239 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:33:25,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f876e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25, skipping insertion in model container [2023-12-02 13:33:25,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,269 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:33:25,407 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_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-12-02 13:33:25,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:33:25,437 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:33:25,448 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_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2023-12-02 13:33:25,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:33:25,479 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:33:25,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25 WrapperNode [2023-12-02 13:33:25,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:33:25,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:33:25,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:33:25,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:33:25,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,525 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 116 [2023-12-02 13:33:25,526 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:33:25,527 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:33:25,527 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:33:25,527 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:33:25,539 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,556 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:33:25,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:33:25,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:33:25,565 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:33:25,566 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (1/1) ... [2023-12-02 13:33:25,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:33:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:25,604 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:33:25,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:33:25,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:33:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:33:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:33:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:33:25,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:33:25,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:33:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:33:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:33:25,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:33:25,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:33:25,749 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:33:25,752 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:33:25,985 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:33:26,073 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:33:26,074 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-12-02 13:33:26,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:33:26 BoogieIcfgContainer [2023-12-02 13:33:26,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:33:26,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:33:26,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:33:26,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:33:26,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:33:25" (1/3) ... [2023-12-02 13:33:26,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67de294e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:33:26, skipping insertion in model container [2023-12-02 13:33:26,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:33:25" (2/3) ... [2023-12-02 13:33:26,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67de294e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:33:26, skipping insertion in model container [2023-12-02 13:33:26,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:33:26" (3/3) ... [2023-12-02 13:33:26,088 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2023-12-02 13:33:26,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:33:26,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:33:26,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:33:26,173 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;@5c8f1fe6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:33:26,173 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:33:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:33:26,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 13:33:26,186 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:26,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:26,187 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:26,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2132052571, now seen corresponding path program 1 times [2023-12-02 13:33:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:26,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903869433] [2023-12-02 13:33:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:33:26,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:26,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903869433] [2023-12-02 13:33:26,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903869433] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:33:26,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:33:26,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:33:26,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462661009] [2023-12-02 13:33:26,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:33:26,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:33:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:26,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:33:26,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:33:26,463 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-12-02 13:33:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:26,562 INFO L93 Difference]: Finished difference Result 52 states and 84 transitions. [2023-12-02 13:33:26,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:33:26,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2023-12-02 13:33:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:26,575 INFO L225 Difference]: With dead ends: 52 [2023-12-02 13:33:26,575 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 13:33:26,579 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 [2023-12-02 13:33:26,583 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:26,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:33:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 13:33:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2023-12-02 13:33:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:33:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2023-12-02 13:33:26,627 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 9 [2023-12-02 13:33:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:26,628 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2023-12-02 13:33:26,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2023-12-02 13:33:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2023-12-02 13:33:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 13:33:26,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:26,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:26,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:33:26,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:26,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -353696715, now seen corresponding path program 1 times [2023-12-02 13:33:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:26,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35776146] [2023-12-02 13:33:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:26,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:33:26,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:26,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35776146] [2023-12-02 13:33:26,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35776146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:26,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729456727] [2023-12-02 13:33:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:26,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:26,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:33:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:26,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:33:26,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:33:26,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:33:26,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729456727] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086501814] [2023-12-02 13:33:26,933 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:26,933 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:26,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:26,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:26,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:27,314 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1086501814] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:33:27,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:27,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 8 [2023-12-02 13:33:27,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387404415] [2023-12-02 13:33:27,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:33:27,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:33:27,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:27,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:33:27,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:33:27,379 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-12-02 13:33:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:27,502 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2023-12-02 13:33:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:33:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2023-12-02 13:33:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:27,504 INFO L225 Difference]: With dead ends: 51 [2023-12-02 13:33:27,504 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 13:33:27,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:33:27,506 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:27,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 18 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:33:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 13:33:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2023-12-02 13:33:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:33:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2023-12-02 13:33:27,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 11 [2023-12-02 13:33:27,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:27,519 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2023-12-02 13:33:27,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-12-02 13:33:27,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2023-12-02 13:33:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 13:33:27,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:27,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:27,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:33:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:27,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:27,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 777080389, now seen corresponding path program 1 times [2023-12-02 13:33:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586200766] [2023-12-02 13:33:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:33:27,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:27,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586200766] [2023-12-02 13:33:27,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586200766] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076530521] [2023-12-02 13:33:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:27,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:27,820 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:27,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:33:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:27,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:33:27,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:33:27,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:33:27,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076530521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:27,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038565006] [2023-12-02 13:33:27,916 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:27,917 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:27,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:27,917 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:27,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:28,228 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-12-02 13:33:28,258 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:28,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '411#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 1) (or (exists ((|v_#memory_int_40| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_40| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1| (store (store (select |v_#memory_int_40| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| 4)) (select (select |v_#memory_int_40| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4) (- 4)) (select (select |v_#memory_int_40| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| 4))))))) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1| 1))))))' at error location [2023-12-02 13:33:28,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:28,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:28,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-12-02 13:33:28,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960280269] [2023-12-02 13:33:28,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:28,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:33:28,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:28,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:33:28,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=132, Unknown=2, NotChecked=0, Total=182 [2023-12-02 13:33:28,640 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-12-02 13:33:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:28,791 INFO L93 Difference]: Finished difference Result 75 states and 116 transitions. [2023-12-02 13:33:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:33:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 12 [2023-12-02 13:33:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:28,793 INFO L225 Difference]: With dead ends: 75 [2023-12-02 13:33:28,794 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 13:33:28,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=132, Unknown=2, NotChecked=0, Total=182 [2023-12-02 13:33:28,796 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:28,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 24 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:33:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 13:33:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-02 13:33:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:33:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 81 transitions. [2023-12-02 13:33:28,815 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 81 transitions. Word has length 12 [2023-12-02 13:33:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:28,815 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 81 transitions. [2023-12-02 13:33:28,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2023-12-02 13:33:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 81 transitions. [2023-12-02 13:33:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:33:28,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:28,816 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:28,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:33:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:29,017 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:29,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1355145570, now seen corresponding path program 2 times [2023-12-02 13:33:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508331507] [2023-12-02 13:33:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:29,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:29,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508331507] [2023-12-02 13:33:29,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508331507] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:29,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637712857] [2023-12-02 13:33:29,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:33:29,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:29,158 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:29,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:33:29,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:33:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:33:29,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:33:29,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:29,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:29,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637712857] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:29,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991675665] [2023-12-02 13:33:29,308 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:29,308 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:29,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:29,309 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:29,309 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:29,515 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:33:29,535 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:29,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '733#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4)))) (or (exists ((|v_#memory_int_45| (Array Int (Array Int Int)))) (= (store |v_#memory_int_45| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2| (store (store (select |v_#memory_int_45| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2| 4)) (select (select |v_#memory_int_45| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 4)) (select (select |v_#memory_int_45| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2| 4))))) |#memory_int|)) (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_2|)) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_2| 0))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 13:33:29,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:29,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:29,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-02 13:33:29,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017640883] [2023-12-02 13:33:29,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:29,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:33:29,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:29,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:33:29,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=245, Unknown=3, NotChecked=0, Total=306 [2023-12-02 13:33:29,885 INFO L87 Difference]: Start difference. First operand 54 states and 81 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-12-02 13:33:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:30,125 INFO L93 Difference]: Finished difference Result 106 states and 165 transitions. [2023-12-02 13:33:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:33:30,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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 15 [2023-12-02 13:33:30,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:30,128 INFO L225 Difference]: With dead ends: 106 [2023-12-02 13:33:30,128 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 13:33:30,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=437, Unknown=3, NotChecked=0, Total=552 [2023-12-02 13:33:30,131 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:30,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 63 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:33:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 13:33:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-02 13:33:30,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 13:33:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2023-12-02 13:33:30,149 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 15 [2023-12-02 13:33:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:30,149 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2023-12-02 13:33:30,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 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) [2023-12-02 13:33:30,150 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2023-12-02 13:33:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 13:33:30,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:30,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:30,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:33:30,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:30,357 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:30,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash 201502012, now seen corresponding path program 3 times [2023-12-02 13:33:30,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:30,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76234380] [2023-12-02 13:33:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:30,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:30,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76234380] [2023-12-02 13:33:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76234380] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226675961] [2023-12-02 13:33:30,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:33:30,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:30,491 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:30,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:33:30,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:33:30,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:33:30,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:33:30,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:30,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:30,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226675961] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:30,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2000228344] [2023-12-02 13:33:30,659 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:30,660 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:30,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:30,660 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:30,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:30,857 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-12-02 13:33:30,879 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:31,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1157#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| Int)) (and (or (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| 1)) (exists ((|v_#memory_int_54| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_54| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3| (store (store (select |v_#memory_int_54| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| 4)) (select (select |v_#memory_int_54| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4) (- 4)) (select (select |v_#memory_int_54| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_3| 4)))))))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 1) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_3| 4) (- 4)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 13:33:31,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:31,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:31,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-12-02 13:33:31,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305157867] [2023-12-02 13:33:31,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:31,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:33:31,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:31,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:33:31,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=259, Unknown=4, NotChecked=0, Total=380 [2023-12-02 13:33:31,247 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 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) [2023-12-02 13:33:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:31,588 INFO L93 Difference]: Finished difference Result 182 states and 283 transitions. [2023-12-02 13:33:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:33:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 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 18 [2023-12-02 13:33:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:31,591 INFO L225 Difference]: With dead ends: 182 [2023-12-02 13:33:31,592 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 13:33:31,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=259, Unknown=4, NotChecked=0, Total=380 [2023-12-02 13:33:31,594 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 196 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:31,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 35 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:33:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 13:33:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-12-02 13:33:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-12-02 13:33:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 190 transitions. [2023-12-02 13:33:31,627 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 190 transitions. Word has length 18 [2023-12-02 13:33:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:31,628 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 190 transitions. [2023-12-02 13:33:31,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 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) [2023-12-02 13:33:31,628 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 190 transitions. [2023-12-02 13:33:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 13:33:31,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:31,629 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:31,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:33:31,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:31,831 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:31,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1352899228, now seen corresponding path program 4 times [2023-12-02 13:33:31,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:31,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132762824] [2023-12-02 13:33:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:31,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:32,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:32,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132762824] [2023-12-02 13:33:32,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132762824] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:32,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612527668] [2023-12-02 13:33:32,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:33:32,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:32,118 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:32,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:33:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:32,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 13:33:32,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:32,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:32,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612527668] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:32,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911885305] [2023-12-02 13:33:32,469 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:32,469 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:32,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:32,469 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:32,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:32,640 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-12-02 13:33:32,687 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:33,063 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1877#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4) (- 4)))) (or (exists ((|v_#memory_int_69| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_69| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4| (store (store (select |v_#memory_int_69| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| 4)) (select (select |v_#memory_int_69| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 4) (- 4)) (select (select |v_#memory_int_69| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| 4))))))) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_4| 1))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_4| 1))))' at error location [2023-12-02 13:33:33,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:33,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:33,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-12-02 13:33:33,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118516995] [2023-12-02 13:33:33,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:33,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 13:33:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 13:33:33,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=624, Unknown=5, NotChecked=0, Total=992 [2023-12-02 13:33:33,067 INFO L87 Difference]: Start difference. First operand 127 states and 190 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 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) [2023-12-02 13:33:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:33,760 INFO L93 Difference]: Finished difference Result 374 states and 595 transitions. [2023-12-02 13:33:33,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 13:33:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 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 24 [2023-12-02 13:33:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:33,764 INFO L225 Difference]: With dead ends: 374 [2023-12-02 13:33:33,765 INFO L226 Difference]: Without dead ends: 259 [2023-12-02 13:33:33,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=624, Unknown=5, NotChecked=0, Total=992 [2023-12-02 13:33:33,768 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 604 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:33,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 46 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:33:33,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-02 13:33:33,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-12-02 13:33:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 212 states have (on average 1.4339622641509433) internal successors, (304), 212 states have internal predecessors, (304), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2023-12-02 13:33:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 394 transitions. [2023-12-02 13:33:33,819 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 394 transitions. Word has length 24 [2023-12-02 13:33:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:33,820 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 394 transitions. [2023-12-02 13:33:33,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 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) [2023-12-02 13:33:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 394 transitions. [2023-12-02 13:33:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 13:33:33,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:33,822 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:33,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 13:33:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:33:34,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:34,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:34,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1422074532, now seen corresponding path program 5 times [2023-12-02 13:33:34,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:34,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608642345] [2023-12-02 13:33:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:34,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 13:33:34,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:34,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608642345] [2023-12-02 13:33:34,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608642345] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:34,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252934130] [2023-12-02 13:33:34,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:33:34,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:34,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:34,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:34,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:33:34,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:33:34,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:33:34,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:33:34,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:33:34,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:33:35,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252934130] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:35,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226121296] [2023-12-02 13:33:35,065 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:35,065 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:35,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:35,065 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:35,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:35,215 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:33:35,263 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:35,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3269#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5| Int)) (and (or (exists ((|v_#memory_int_74| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_74| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5| (store (store (select |v_#memory_int_74| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5|) (select (select |v_#memory_int_74| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4)) (select (select |v_#memory_int_74| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5|)))))) (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_5|)) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_5| 4)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 13:33:35,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:35,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:35,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 36 [2023-12-02 13:33:35,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401391681] [2023-12-02 13:33:35,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:35,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 13:33:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:35,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 13:33:35,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1402, Unknown=7, NotChecked=0, Total=1892 [2023-12-02 13:33:35,701 INFO L87 Difference]: Start difference. First operand 259 states and 394 transitions. Second operand has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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) [2023-12-02 13:33:40,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:40,898 INFO L93 Difference]: Finished difference Result 632 states and 1030 transitions. [2023-12-02 13:33:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-12-02 13:33:40,899 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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 36 [2023-12-02 13:33:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:40,902 INFO L225 Difference]: With dead ends: 632 [2023-12-02 13:33:40,902 INFO L226 Difference]: Without dead ends: 397 [2023-12-02 13:33:40,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10317 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=9233, Invalid=22622, Unknown=7, NotChecked=0, Total=31862 [2023-12-02 13:33:40,914 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 956 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:40,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 85 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:33:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-12-02 13:33:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 388. [2023-12-02 13:33:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 337 states have (on average 1.2967359050445104) internal successors, (437), 337 states have internal predecessors, (437), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-12-02 13:33:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 535 transitions. [2023-12-02 13:33:40,965 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 535 transitions. Word has length 36 [2023-12-02 13:33:40,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:40,966 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 535 transitions. [2023-12-02 13:33:40,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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) [2023-12-02 13:33:40,966 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 535 transitions. [2023-12-02 13:33:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 13:33:40,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:40,968 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:40,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:33:41,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 13:33:41,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:41,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1340318012, now seen corresponding path program 6 times [2023-12-02 13:33:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:41,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55890149] [2023-12-02 13:33:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:41,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:33:41,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55890149] [2023-12-02 13:33:41,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55890149] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:41,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950290522] [2023-12-02 13:33:41,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:33:41,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:41,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:41,759 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:41,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:33:41,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:33:41,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:33:41,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 13:33:41,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:33:41,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:33:42,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950290522] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:42,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1500300095] [2023-12-02 13:33:42,657 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:42,657 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:42,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:42,658 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:42,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:42,789 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-12-02 13:33:42,802 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:43,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5735#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6| Int)) (and (or (exists ((|v_#memory_int_103| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_103| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6| (store (store (select |v_#memory_int_103| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| 4)) (select (select |v_#memory_int_103| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)) (select (select |v_#memory_int_103| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| 4))))))) (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_6| 1))) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 1))))' at error location [2023-12-02 13:33:43,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:43,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:43,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-12-02 13:33:43,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534705981] [2023-12-02 13:33:43,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:43,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-02 13:33:43,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:43,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-02 13:33:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2040, Unknown=3, NotChecked=0, Total=3540 [2023-12-02 13:33:43,215 INFO L87 Difference]: Start difference. First operand 388 states and 535 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 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) [2023-12-02 13:33:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:45,064 INFO L93 Difference]: Finished difference Result 1036 states and 1537 transitions. [2023-12-02 13:33:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-12-02 13:33:45,065 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 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 44 [2023-12-02 13:33:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:45,071 INFO L225 Difference]: With dead ends: 1036 [2023-12-02 13:33:45,071 INFO L226 Difference]: Without dead ends: 674 [2023-12-02 13:33:45,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1497, Invalid=2040, Unknown=3, NotChecked=0, Total=3540 [2023-12-02 13:33:45,074 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1573 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:45,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1673 Valid, 68 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:33:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-12-02 13:33:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2023-12-02 13:33:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 571 states have (on average 1.3572679509632224) internal successors, (775), 571 states have internal predecessors, (775), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-02 13:33:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 977 transitions. [2023-12-02 13:33:45,148 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 977 transitions. Word has length 44 [2023-12-02 13:33:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:45,148 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 977 transitions. [2023-12-02 13:33:45,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 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) [2023-12-02 13:33:45,149 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 977 transitions. [2023-12-02 13:33:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 13:33:45,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:45,151 INFO L195 NwaCegarLoop]: trace histogram [50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:45,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:33:45,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:45,352 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:45,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:45,353 INFO L85 PathProgramCache]: Analyzing trace with hash 185718236, now seen corresponding path program 7 times [2023-12-02 13:33:45,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:45,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772553017] [2023-12-02 13:33:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:45,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:33:47,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:33:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772553017] [2023-12-02 13:33:47,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772553017] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:33:47,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061390132] [2023-12-02 13:33:47,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:33:47,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:47,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:33:47,207 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:33:47,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:33:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:33:47,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 13:33:47,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:33:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:33:47,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:33:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:33:50,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061390132] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:33:50,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487295674] [2023-12-02 13:33:50,040 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:33:50,040 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:33:50,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:33:50,040 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:33:50,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:33:50,166 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:33:50,180 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:33:50,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9413#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 0) (or (exists ((|v_#memory_int_158| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_158| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7| (store (store (select |v_#memory_int_158| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7| 4)) (select (select |v_#memory_int_158| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4)) (select (select |v_#memory_int_158| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7| 4))))))) (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_7|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 13:33:50,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:33:50,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:33:50,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 103 [2023-12-02 13:33:50,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769132405] [2023-12-02 13:33:50,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:33:50,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-12-02 13:33:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:33:50,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-12-02 13:33:50,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5683, Invalid=6745, Unknown=4, NotChecked=0, Total=12432 [2023-12-02 13:33:50,601 INFO L87 Difference]: Start difference. First operand 674 states and 977 transitions. Second operand has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 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) [2023-12-02 13:33:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:59,408 INFO L93 Difference]: Finished difference Result 1868 states and 2889 transitions. [2023-12-02 13:33:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-12-02 13:33:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 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 70 [2023-12-02 13:33:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:59,420 INFO L225 Difference]: With dead ends: 1868 [2023-12-02 13:33:59,421 INFO L226 Difference]: Without dead ends: 1246 [2023-12-02 13:33:59,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5683, Invalid=6745, Unknown=4, NotChecked=0, Total=12432 [2023-12-02 13:33:59,427 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3094 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3298 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:59,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3298 Valid, 68 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 13:33:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-12-02 13:33:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1246. [2023-12-02 13:33:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1039 states have (on average 1.3965351299326276) internal successors, (1451), 1039 states have internal predecessors, (1451), 205 states have call successors, (205), 1 states have call predecessors, (205), 1 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2023-12-02 13:33:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1861 transitions. [2023-12-02 13:33:59,681 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1861 transitions. Word has length 70 [2023-12-02 13:33:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:59,682 INFO L495 AbstractCegarLoop]: Abstraction has 1246 states and 1861 transitions. [2023-12-02 13:33:59,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 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) [2023-12-02 13:33:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1861 transitions. [2023-12-02 13:33:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 13:33:59,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:59,686 INFO L195 NwaCegarLoop]: trace histogram [102, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:33:59,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:33:59,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:59,887 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:59,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:59,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1547917540, now seen corresponding path program 8 times [2023-12-02 13:33:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:59,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124579612] [2023-12-02 13:33:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:34:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:34:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 13:34:06,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:34:06,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124579612] [2023-12-02 13:34:06,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124579612] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:34:06,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770394825] [2023-12-02 13:34:06,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:34:06,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:34:06,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:34:06,802 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:34:06,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:34:07,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 13:34:07,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:34:07,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:34:07,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:34:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2023-12-02 13:34:07,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:34:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2023-12-02 13:34:08,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770394825] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:34:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307846571] [2023-12-02 13:34:08,286 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:34:08,287 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:34:08,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:34:08,287 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:34:08,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:34:08,403 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:34:08,416 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:34:09,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15975#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_8| Int)) (and (or (exists ((|v_#memory_int_163| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_163| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8| (store (store (select |v_#memory_int_163| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_8| 4)) (select (select |v_#memory_int_163| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 4)) (select (select |v_#memory_int_163| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_8| 4))))))) (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_8|)) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 4)))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 13:34:09,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:34:09,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:34:09,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 14, 14] total 128 [2023-12-02 13:34:09,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157210840] [2023-12-02 13:34:09,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:34:09,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-12-02 13:34:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:34:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-12-02 13:34:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6173, Invalid=12182, Unknown=5, NotChecked=0, Total=18360 [2023-12-02 13:34:09,367 INFO L87 Difference]: Start difference. First operand 1246 states and 1861 transitions. Second operand has 128 states, 128 states have (on average 1.09375) internal successors, (140), 128 states have internal predecessors, (140), 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) [2023-12-02 13:38:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:53,137 INFO L93 Difference]: Finished difference Result 3414 states and 5660 transitions. [2023-12-02 13:38:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1317 states. [2023-12-02 13:38:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.09375) internal successors, (140), 128 states have internal predecessors, (140), 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 122 [2023-12-02 13:38:53,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:53,149 INFO L225 Difference]: With dead ends: 3414 [2023-12-02 13:38:53,149 INFO L226 Difference]: Without dead ends: 2272 [2023-12-02 13:38:53,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1678 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744609 ImplicationChecksByTransitivity, 229.2s TimeCoverageRelationStatistics Valid=517123, Invalid=1293242, Unknown=5, NotChecked=0, Total=1810370 [2023-12-02 13:38:53,309 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 8973 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9181 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:53,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9181 Valid, 63 Invalid, 2413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 13:38:53,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2023-12-02 13:38:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2263. [2023-12-02 13:38:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2052 states have (on average 1.2046783625730995) internal successors, (2472), 2052 states have internal predecessors, (2472), 209 states have call successors, (209), 1 states have call predecessors, (209), 1 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2023-12-02 13:38:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 2890 transitions. [2023-12-02 13:38:53,556 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 2890 transitions. Word has length 122 [2023-12-02 13:38:53,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:53,557 INFO L495 AbstractCegarLoop]: Abstraction has 2263 states and 2890 transitions. [2023-12-02 13:38:53,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.09375) internal successors, (140), 128 states have internal predecessors, (140), 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) [2023-12-02 13:38:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 2890 transitions. [2023-12-02 13:38:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 13:38:53,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:53,559 INFO L195 NwaCegarLoop]: trace histogram [104, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:53,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:53,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:38:53,760 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:38:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1716508604, now seen corresponding path program 9 times [2023-12-02 13:38:53,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:38:53,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535579402] [2023-12-02 13:38:53,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:53,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:38:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5713 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:38:59,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:38:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535579402] [2023-12-02 13:38:59,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535579402] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419466745] [2023-12-02 13:38:59,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:38:59,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:59,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:59,494 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:59,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:38:59,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:38:59,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:38:59,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 106 conjunts are in the unsatisfiable core [2023-12-02 13:38:59,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5713 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:39:00,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5713 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:39:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419466745] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [592786365] [2023-12-02 13:39:10,260 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:39:10,260 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:39:10,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:39:10,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:39:10,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:39:10,359 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 39 for LOIs [2023-12-02 13:39:10,371 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:39:11,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30137#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_9| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 4)))) (or (= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_9|) (exists ((|v_#memory_int_272| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_272| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9| (store (store (select |v_#memory_int_272| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_9| 4)) (select (select |v_#memory_int_272| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 4)) (select (select |v_#memory_int_272| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_9| 4)))))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 13:39:11,046 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:39:11,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:39:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2023-12-02 13:39:11,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926164766] [2023-12-02 13:39:11,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:11,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2023-12-02 13:39:11,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:39:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2023-12-02 13:39:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23017, Invalid=25159, Unknown=4, NotChecked=0, Total=48180 [2023-12-02 13:39:11,058 INFO L87 Difference]: Start difference. First operand 2263 states and 2890 transitions. Second operand has 212 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 211 states have internal predecessors, (220), 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) [2023-12-02 13:40:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:32,687 INFO L93 Difference]: Finished difference Result 5586 states and 7687 transitions. [2023-12-02 13:40:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-12-02 13:40:32,688 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 211 states have internal predecessors, (220), 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 136 [2023-12-02 13:40:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:32,703 INFO L225 Difference]: With dead ends: 5586 [2023-12-02 13:40:32,703 INFO L226 Difference]: Without dead ends: 3429 [2023-12-02 13:40:32,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=23017, Invalid=25159, Unknown=4, NotChecked=0, Total=48180 [2023-12-02 13:40:32,709 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9190 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3392 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9610 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 4864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 3392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:32,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9610 Valid, 90 Invalid, 4864 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1472 Valid, 3392 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 13:40:32,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2023-12-02 13:40:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 3429. [2023-12-02 13:40:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3006 states have (on average 1.2807717897538258) internal successors, (3850), 3006 states have internal predecessors, (3850), 421 states have call successors, (421), 1 states have call predecessors, (421), 1 states have return successors, (421), 421 states have call predecessors, (421), 421 states have call successors, (421) [2023-12-02 13:40:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 4692 transitions. [2023-12-02 13:40:33,051 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 4692 transitions. Word has length 136 [2023-12-02 13:40:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:33,052 INFO L495 AbstractCegarLoop]: Abstraction has 3429 states and 4692 transitions. [2023-12-02 13:40:33,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 211 states have internal predecessors, (220), 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) [2023-12-02 13:40:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 4692 transitions. [2023-12-02 13:40:33,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-12-02 13:40:33,054 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:33,054 INFO L195 NwaCegarLoop]: trace histogram [210, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:40:33,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 13:40:33,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:33,255 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:40:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1550850396, now seen corresponding path program 10 times [2023-12-02 13:40:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:33,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286746038] [2023-12-02 13:40:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22408 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:40:54,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286746038] [2023-12-02 13:40:54,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286746038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:40:54,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672114244] [2023-12-02 13:40:54,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:40:54,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:54,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:54,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:54,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5a50b39-22ac-4930-bf21-4aa17b2e2bac/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:40:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:55,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 2043 conjuncts, 212 conjunts are in the unsatisfiable core [2023-12-02 13:40:55,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22408 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:40:55,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:41:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22408 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2023-12-02 13:41:35,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672114244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:41:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360369608] [2023-12-02 13:41:35,778 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 13:41:35,778 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:41:35,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:41:35,778 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:41:35,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:41:35,903 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2023-12-02 13:41:35,916 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:41:39,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48977#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_10| 1) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_10| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (- 4) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_10| 4)))) (or (= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_10| (+ |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_10| 1)) (exists ((|v_#memory_int_487| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_487| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10| (store (store (select |v_#memory_int_487| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_10| 4)) (select (select |v_#memory_int_487| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (- 4) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_10| 4)))) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (- 4) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_10| 4)) (select (select |v_#memory_int_487| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_10| 4)))))))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-12-02 13:41:39,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:41:39,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:41:39,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [212, 212, 212] total 423 [2023-12-02 13:41:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139189731] [2023-12-02 13:41:39,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:41:39,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 424 states [2023-12-02 13:41:39,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:41:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 424 interpolants. [2023-12-02 13:41:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90962, Invalid=95225, Unknown=5, NotChecked=0, Total=186192 [2023-12-02 13:41:39,117 INFO L87 Difference]: Start difference. First operand 3429 states and 4692 transitions. Second operand has 424 states, 424 states have (on average 1.0188679245283019) internal successors, (432), 423 states have internal predecessors, (432), 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)