./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/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_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/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_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/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 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:31:06,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:31:06,304 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:31:06,310 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:31:06,310 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:31:06,334 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:31:06,335 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:31:06,336 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:31:06,336 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:31:06,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:31:06,338 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:31:06,338 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:31:06,339 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:31:06,339 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:31:06,340 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:31:06,340 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:31:06,341 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:31:06,341 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:31:06,342 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:31:06,343 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:31:06,343 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:31:06,344 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:31:06,345 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:31:06,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:31:06,346 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:31:06,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:31:06,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:31:06,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:31:06,348 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:31:06,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:31:06,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:31:06,349 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:31:06,350 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:31:06,350 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:31:06,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:31:06,351 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:31:06,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:31:06,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:31:06,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:31:06,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:31:06,352 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:31:06,352 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:31:06,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:31:06,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:31:06,353 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:31:06,353 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:31:06,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:31:06,353 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_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 [2023-12-02 19:31:06,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:31:06,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:31:06,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:31:06,647 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:31:06,647 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:31:06,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2023-12-02 19:31:09,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:31:09,691 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:31:09,691 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2023-12-02 19:31:09,699 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/data/941a4b02f/0bd44a5b4552411f9146065238c0ea73/FLAG12d0bf91e [2023-12-02 19:31:09,715 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/data/941a4b02f/0bd44a5b4552411f9146065238c0ea73 [2023-12-02 19:31:09,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:31:09,718 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:31:09,720 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:31:09,720 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:31:09,725 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:31:09,726 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:31:09" (1/1) ... [2023-12-02 19:31:09,727 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:09, skipping insertion in model container [2023-12-02 19:31:09,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:31:09" (1/1) ... [2023-12-02 19:31:09,766 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:31:09,955 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_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2023-12-02 19:31:09,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:31:09,987 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:31:10,003 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_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2023-12-02 19:31:10,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:31:10,029 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:31:10,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10 WrapperNode [2023-12-02 19:31:10,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:31:10,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:31:10,031 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:31:10,032 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:31:10,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,070 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-12-02 19:31:10,071 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:31:10,072 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:31:10,072 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:31:10,072 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:31:10,079 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,087 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:31:10,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:31:10,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:31:10,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:31:10,098 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (1/1) ... [2023-12-02 19:31:10,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:31:10,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:10,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:31:10,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:31:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:31:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:31:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:31:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:31:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:31:10,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:31:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:31:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:31:10,245 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:31:10,248 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:31:10,424 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:31:10,497 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:31:10,497 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-02 19:31:10,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:31:10 BoogieIcfgContainer [2023-12-02 19:31:10,499 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:31:10,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:31:10,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:31:10,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:31:10,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:31:09" (1/3) ... [2023-12-02 19:31:10,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a165f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:31:10, skipping insertion in model container [2023-12-02 19:31:10,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:31:10" (2/3) ... [2023-12-02 19:31:10,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a165f3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:31:10, skipping insertion in model container [2023-12-02 19:31:10,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:31:10" (3/3) ... [2023-12-02 19:31:10,511 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2023-12-02 19:31:10,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:31:10,535 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:31:10,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:31:10,589 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;@236ffbb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:31:10,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:31:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:31:10,599 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:10,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:10,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:10,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash -267666341, now seen corresponding path program 1 times [2023-12-02 19:31:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:10,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991616930] [2023-12-02 19:31:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:10,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:10,808 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 19:31:10,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:10,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991616930] [2023-12-02 19:31:10,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991616930] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:31:10,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:31:10,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:31:10,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380969178] [2023-12-02 19:31:10,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:31:10,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:31:10,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:31:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:31:10,844 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:10,886 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2023-12-02 19:31:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:31:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:31:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:10,895 INFO L225 Difference]: With dead ends: 21 [2023-12-02 19:31:10,895 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 19:31:10,898 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 19:31:10,902 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:10,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:31:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 19:31:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-12-02 19:31:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2023-12-02 19:31:10,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2023-12-02 19:31:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:10,932 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2023-12-02 19:31:10,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2023-12-02 19:31:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:31:10,933 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:10,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:10,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:31:10,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:10,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:10,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1616020672, now seen corresponding path program 1 times [2023-12-02 19:31:10,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:10,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845893361] [2023-12-02 19:31:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:11,031 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 19:31:11,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:11,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845893361] [2023-12-02 19:31:11,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845893361] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:11,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355650541] [2023-12-02 19:31:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:11,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:11,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:11,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:31:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:11,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:31:11,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:31:11,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:31:11,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355650541] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:31:11,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:31:11,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-02 19:31:11,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497045293] [2023-12-02 19:31:11,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:31:11,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:31:11,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:31:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:31:11,160 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:11,204 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-12-02 19:31:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:31:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 19:31:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:11,206 INFO L225 Difference]: With dead ends: 18 [2023-12-02 19:31:11,206 INFO L226 Difference]: Without dead ends: 12 [2023-12-02 19:31:11,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:31:11,209 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:11,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:31:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-02 19:31:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-12-02 19:31:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-12-02 19:31:11,214 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2023-12-02 19:31:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:11,214 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-12-02 19:31:11,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-12-02 19:31:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:31:11,215 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:11,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:11,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:31:11,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-02 19:31:11,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:11,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash -670893389, now seen corresponding path program 1 times [2023-12-02 19:31:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:11,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969979451] [2023-12-02 19:31:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:11,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:11,481 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 19:31:11,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969979451] [2023-12-02 19:31:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969979451] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881976146] [2023-12-02 19:31:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:11,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:11,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:11,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:11,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:31:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:11,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 19:31:11,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:31:11,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:31:11,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881976146] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:31:11,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:31:11,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-12-02 19:31:11,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829414228] [2023-12-02 19:31:11,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:31:11,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:31:11,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:11,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:31:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:31:11,568 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:11,592 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2023-12-02 19:31:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:31:11,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:31:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:11,593 INFO L225 Difference]: With dead ends: 21 [2023-12-02 19:31:11,593 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 19:31:11,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:31:11,595 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:11,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:31:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 19:31:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-02 19:31:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2023-12-02 19:31:11,600 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2023-12-02 19:31:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:11,601 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2023-12-02 19:31:11,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2023-12-02 19:31:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:31:11,602 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:11,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:11,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:31:11,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-12-02 19:31:11,802 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:11,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash -918020549, now seen corresponding path program 1 times [2023-12-02 19:31:11,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:11,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140227389] [2023-12-02 19:31:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:11,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:31:11,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140227389] [2023-12-02 19:31:11,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140227389] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286091022] [2023-12-02 19:31:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:11,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:11,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:11,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:11,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:31:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:11,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 19:31:11,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:31:11,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:31:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:31:11,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286091022] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:31:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912286633] [2023-12-02 19:31:12,021 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:31:12,021 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:31:12,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:31:12,032 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:31:12,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:31:12,493 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:31:12,719 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '290#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:31:12,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:31:12,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:31:12,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-02 19:31:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682851734] [2023-12-02 19:31:12,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:31:12,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:31:12,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:31:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:31:12,722 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:12,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:12,765 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2023-12-02 19:31:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:31:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 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 19:31:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:12,767 INFO L225 Difference]: With dead ends: 26 [2023-12-02 19:31:12,767 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 19:31:12,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-02 19:31:12,769 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:12,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:31:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 19:31:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 19:31:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-12-02 19:31:12,774 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2023-12-02 19:31:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:12,774 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-12-02 19:31:12,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-12-02 19:31:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 19:31:12,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:12,776 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:12,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:31:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-02 19:31:12,977 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:12,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash -741414400, now seen corresponding path program 2 times [2023-12-02 19:31:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:12,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397136583] [2023-12-02 19:31:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:31:13,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397136583] [2023-12-02 19:31:13,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397136583] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:13,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609776393] [2023-12-02 19:31:13,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:31:13,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:13,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:13,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:13,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:31:13,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 19:31:13,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:31:13,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:31:13,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:31:13,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:31:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:31:13,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609776393] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:31:13,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770649428] [2023-12-02 19:31:13,298 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:31:13,298 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:31:13,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:31:13,299 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:31:13,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:31:13,670 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:31:13,906 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '459#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:31:13,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:31:13,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:31:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-12-02 19:31:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965538226] [2023-12-02 19:31:13,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:31:13,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:31:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:31:13,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-12-02 19:31:13,909 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:13,968 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2023-12-02 19:31:13,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 19:31:13,969 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 19:31:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:13,970 INFO L225 Difference]: With dead ends: 33 [2023-12-02 19:31:13,970 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 19:31:13,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-12-02 19:31:13,972 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:13,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:31:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 19:31:13,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-02 19:31:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-12-02 19:31:13,978 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2023-12-02 19:31:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:13,978 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-12-02 19:31:13,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-12-02 19:31:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 19:31:13,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:13,979 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:13,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:31:14,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:14,186 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:14,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2020485522, now seen corresponding path program 3 times [2023-12-02 19:31:14,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:14,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421250246] [2023-12-02 19:31:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-02 19:31:14,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421250246] [2023-12-02 19:31:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421250246] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765363205] [2023-12-02 19:31:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:31:14,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:14,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:14,335 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:14,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:31:14,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:31:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:31:14,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:31:14,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:31:14,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:31:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:31:14,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765363205] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:31:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1538574437] [2023-12-02 19:31:14,841 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:31:14,841 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:31:14,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:31:14,841 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:31:14,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:31:15,026 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:31:15,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '711#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:31:15,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:31:15,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:31:15,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 12] total 27 [2023-12-02 19:31:15,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496997532] [2023-12-02 19:31:15,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:31:15,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 19:31:15,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 19:31:15,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=812, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 19:31:15,294 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:15,378 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2023-12-02 19:31:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 19:31:15,379 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-02 19:31:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:15,380 INFO L225 Difference]: With dead ends: 47 [2023-12-02 19:31:15,380 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 19:31:15,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=812, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 19:31:15,383 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:15,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:31:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 19:31:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-02 19:31:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-12-02 19:31:15,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2023-12-02 19:31:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:15,391 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-12-02 19:31:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-12-02 19:31:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 19:31:15,393 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:15,393 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:15,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 19:31:15,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 19:31:15,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:15,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1928949280, now seen corresponding path program 4 times [2023-12-02 19:31:15,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:15,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637135646] [2023-12-02 19:31:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:15,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:31:16,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637135646] [2023-12-02 19:31:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637135646] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:16,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223989894] [2023-12-02 19:31:16,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:31:16,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:16,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:16,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:16,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:31:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:16,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:31:16,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:31:16,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:31:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:31:17,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223989894] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:31:17,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924058063] [2023-12-02 19:31:17,515 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:31:17,515 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:31:17,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:31:17,516 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:31:17,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:31:17,719 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:31:18,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1117#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:31:18,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:31:18,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:31:18,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-12-02 19:31:18,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515733869] [2023-12-02 19:31:18,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:31:18,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 19:31:18,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 19:31:18,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=1879, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 19:31:18,020 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:18,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:18,149 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2023-12-02 19:31:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 19:31:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 19:31:18,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:18,151 INFO L225 Difference]: With dead ends: 72 [2023-12-02 19:31:18,152 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 19:31:18,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1201, Invalid=1879, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 19:31:18,155 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:18,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:31:18,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 19:31:18,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 19:31:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-12-02 19:31:18,165 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2023-12-02 19:31:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:18,165 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-12-02 19:31:18,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-12-02 19:31:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 19:31:18,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:18,168 INFO L195 NwaCegarLoop]: trace histogram [46, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:18,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:31:18,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 19:31:18,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:18,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:18,373 INFO L85 PathProgramCache]: Analyzing trace with hash 592295584, now seen corresponding path program 5 times [2023-12-02 19:31:18,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:18,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818682398] [2023-12-02 19:31:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:18,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:31:20,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:20,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818682398] [2023-12-02 19:31:20,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818682398] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612931906] [2023-12-02 19:31:20,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:31:20,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:20,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:20,434 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:20,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:31:20,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 19:31:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:31:20,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:31:20,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-12-02 19:31:20,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:31:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-12-02 19:31:20,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612931906] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:31:20,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473941774] [2023-12-02 19:31:20,818 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:31:20,818 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:31:20,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:31:20,818 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:31:20,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:31:20,998 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:31:21,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1773#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:31:21,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:31:21,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:31:21,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 6, 6] total 57 [2023-12-02 19:31:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370185184] [2023-12-02 19:31:21,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:31:21,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 19:31:21,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 19:31:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1245, Invalid=2787, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 19:31:21,420 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:21,550 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-12-02 19:31:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-02 19:31:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-02 19:31:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:21,552 INFO L225 Difference]: With dead ends: 78 [2023-12-02 19:31:21,552 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 19:31:21,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1245, Invalid=2787, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 19:31:21,556 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:21,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:31:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 19:31:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-12-02 19:31:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2023-12-02 19:31:21,567 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 58 [2023-12-02 19:31:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:21,567 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2023-12-02 19:31:21,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:21,568 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2023-12-02 19:31:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 19:31:21,570 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:21,570 INFO L195 NwaCegarLoop]: trace histogram [47, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:21,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:31:21,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:21,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:21,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash 63322195, now seen corresponding path program 6 times [2023-12-02 19:31:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176238744] [2023-12-02 19:31:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:31:23,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176238744] [2023-12-02 19:31:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176238744] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394594162] [2023-12-02 19:31:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:31:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:23,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:23,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:31:23,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:31:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:31:23,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 19:31:23,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:31:24,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:31:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:31:26,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394594162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:31:26,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234600713] [2023-12-02 19:31:26,867 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:31:26,867 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:31:26,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:31:26,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:31:26,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:31:27,042 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:31:27,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2531#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:31:27,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:31:27,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:31:27,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2023-12-02 19:31:27,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430462266] [2023-12-02 19:31:27,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:31:27,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-12-02 19:31:27,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-12-02 19:31:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4876, Invalid=6254, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 19:31:27,387 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:27,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:27,620 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2023-12-02 19:31:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-12-02 19:31:27,620 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-02 19:31:27,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:27,622 INFO L225 Difference]: With dead ends: 132 [2023-12-02 19:31:27,622 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 19:31:27,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4876, Invalid=6254, Unknown=0, NotChecked=0, Total=11130 [2023-12-02 19:31:27,626 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:27,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:31:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 19:31:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-12-02 19:31:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2023-12-02 19:31:27,640 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 64 [2023-12-02 19:31:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:27,640 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2023-12-02 19:31:27,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2023-12-02 19:31:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-12-02 19:31:27,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:27,644 INFO L195 NwaCegarLoop]: trace histogram [96, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:27,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 19:31:27,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 19:31:27,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:27,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash 426424334, now seen corresponding path program 7 times [2023-12-02 19:31:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:27,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564750787] [2023-12-02 19:31:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:27,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:31:33,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:31:33,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564750787] [2023-12-02 19:31:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564750787] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:31:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450488263] [2023-12-02 19:31:33,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:31:33,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:33,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:31:33,880 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:31:33,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:31:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:31:34,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-02 19:31:34,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:31:34,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:31:34,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:31:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:31:44,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450488263] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:31:44,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191027691] [2023-12-02 19:31:44,297 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:31:44,297 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:31:44,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:31:44,297 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:31:44,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:31:44,461 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:31:45,011 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3887#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:31:45,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:31:45,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:31:45,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 196 [2023-12-02 19:31:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822029253] [2023-12-02 19:31:45,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:31:45,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-12-02 19:31:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:31:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-12-02 19:31:45,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19331, Invalid=22081, Unknown=0, NotChecked=0, Total=41412 [2023-12-02 19:31:45,027 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:31:45,549 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2023-12-02 19:31:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-12-02 19:31:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-12-02 19:31:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:31:45,553 INFO L225 Difference]: With dead ends: 230 [2023-12-02 19:31:45,553 INFO L226 Difference]: Without dead ends: 213 [2023-12-02 19:31:45,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=19331, Invalid=22081, Unknown=0, NotChecked=0, Total=41412 [2023-12-02 19:31:45,557 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:31:45,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:31:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-12-02 19:31:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2023-12-02 19:31:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:45,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2023-12-02 19:31:45,572 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 113 [2023-12-02 19:31:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:31:45,573 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2023-12-02 19:31:45,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:31:45,573 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2023-12-02 19:31:45,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-12-02 19:31:45,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:31:45,576 INFO L195 NwaCegarLoop]: trace histogram [194, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:31:45,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:31:45,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:31:45,777 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:31:45,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:31:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 552594094, now seen corresponding path program 8 times [2023-12-02 19:31:45,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:31:45,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214356172] [2023-12-02 19:31:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:31:45,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:31:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-12-02 19:32:07,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:07,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214356172] [2023-12-02 19:32:07,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214356172] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:32:07,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835386839] [2023-12-02 19:32:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:32:07,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:32:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:32:07,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:32:07,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:32:07,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 19:32:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:32:07,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 19:32:07,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:32:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2023-12-02 19:32:08,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:32:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2023-12-02 19:32:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835386839] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:32:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427984325] [2023-12-02 19:32:09,250 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:32:09,250 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:32:09,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:32:09,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:32:09,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:32:09,370 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:32:10,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6241#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:32:10,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:32:10,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:32:10,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 11, 11] total 215 [2023-12-02 19:32:10,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922713314] [2023-12-02 19:32:10,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:32:10,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2023-12-02 19:32:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:32:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2023-12-02 19:32:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19520, Invalid=29542, Unknown=0, NotChecked=0, Total=49062 [2023-12-02 19:32:10,293 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 215 states, 215 states have (on average 1.0558139534883721) internal successors, (227), 215 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:32:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:32:10,974 INFO L93 Difference]: Finished difference Result 241 states and 259 transitions. [2023-12-02 19:32:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2023-12-02 19:32:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 1.0558139534883721) internal successors, (227), 215 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2023-12-02 19:32:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:32:10,977 INFO L225 Difference]: With dead ends: 241 [2023-12-02 19:32:10,977 INFO L226 Difference]: Without dead ends: 224 [2023-12-02 19:32:10,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5026 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=19520, Invalid=29542, Unknown=0, NotChecked=0, Total=49062 [2023-12-02 19:32:10,980 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:32:10,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:32:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-02 19:32:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2023-12-02 19:32:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0224215246636772) internal successors, (228), 223 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:32:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2023-12-02 19:32:11,002 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 211 [2023-12-02 19:32:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:32:11,003 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2023-12-02 19:32:11,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 1.0558139534883721) internal successors, (227), 215 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:32:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2023-12-02 19:32:11,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-12-02 19:32:11,008 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:32:11,008 INFO L195 NwaCegarLoop]: trace histogram [195, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:32:11,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 19:32:11,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:32:11,209 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:32:11,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:32:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash 314212115, now seen corresponding path program 9 times [2023-12-02 19:32:11,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:32:11,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283121497] [2023-12-02 19:32:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:32:11,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:32:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:32:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 19:32:32,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:32:32,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283121497] [2023-12-02 19:32:32,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283121497] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:32:32,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850267358] [2023-12-02 19:32:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:32:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:32:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:32:32,710 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:32:32,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:32:33,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:32:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:32:33,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 1976 conjuncts, 197 conjunts are in the unsatisfiable core [2023-12-02 19:32:33,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:32:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 19:32:33,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:33:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 19:33:13,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850267358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:33:13,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191507415] [2023-12-02 19:33:13,611 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:33:13,612 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:33:13,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:33:13,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:33:13,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:33:13,735 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:33:14,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8885#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:33:14,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:33:14,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:33:14,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197, 197] total 394 [2023-12-02 19:33:14,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969872441] [2023-12-02 19:33:14,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:33:14,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2023-12-02 19:33:14,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:33:14,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2023-12-02 19:33:14,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77840, Invalid=83362, Unknown=0, NotChecked=0, Total=161202 [2023-12-02 19:33:14,651 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 395 states, 395 states have (on average 1.0227848101265822) internal successors, (404), 394 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:33:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:33:17,269 INFO L93 Difference]: Finished difference Result 448 states and 652 transitions. [2023-12-02 19:33:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2023-12-02 19:33:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 1.0227848101265822) internal successors, (404), 394 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2023-12-02 19:33:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:33:17,274 INFO L225 Difference]: With dead ends: 448 [2023-12-02 19:33:17,274 INFO L226 Difference]: Without dead ends: 421 [2023-12-02 19:33:17,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 400 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4897 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=77840, Invalid=83362, Unknown=0, NotChecked=0, Total=161202 [2023-12-02 19:33:17,284 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:33:17,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:33:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-12-02 19:33:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2023-12-02 19:33:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.0119047619047619) internal successors, (425), 420 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:33:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 425 transitions. [2023-12-02 19:33:17,307 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 425 transitions. Word has length 222 [2023-12-02 19:33:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:33:17,308 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 425 transitions. [2023-12-02 19:33:17,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 1.0227848101265822) internal successors, (404), 394 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:33:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 425 transitions. [2023-12-02 19:33:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2023-12-02 19:33:17,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:33:17,318 INFO L195 NwaCegarLoop]: trace histogram [392, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:33:17,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 19:33:17,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 19:33:17,519 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:33:17,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:33:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1450617906, now seen corresponding path program 10 times [2023-12-02 19:33:17,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:33:17,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503242480] [2023-12-02 19:33:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:33:17,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:33:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 19:34:50,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:34:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503242480] [2023-12-02 19:34:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503242480] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:34:50,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666243133] [2023-12-02 19:34:50,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:34:50,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:34:50,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:34:50,283 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:34:50,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:34:51,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:34:51,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 3749 conjuncts, 394 conjunts are in the unsatisfiable core [2023-12-02 19:34:51,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:34:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 19:34:51,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:37:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 19:37:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666243133] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:37:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97202872] [2023-12-02 19:37:36,396 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:37:36,397 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:37:36,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:37:36,397 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:37:36,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:37:36,512 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:37:38,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13913#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (<= (+ |ULTIMATE.start_main_#t~mem10#1| 1) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~y~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem10#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_~swapped~0#1| 0))' at error location [2023-12-02 19:37:38,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:37:38,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:37:38,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [394, 394, 394] total 788 [2023-12-02 19:37:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654568395] [2023-12-02 19:37:38,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:37:38,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 789 states [2023-12-02 19:37:38,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:37:38,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 789 interpolants. [2023-12-02 19:37:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310891, Invalid=321929, Unknown=0, NotChecked=0, Total=632820 [2023-12-02 19:37:38,245 INFO L87 Difference]: Start difference. First operand 421 states and 425 transitions. Second operand has 789 states, 789 states have (on average 1.0114068441064639) internal successors, (798), 788 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:37:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:37:53,246 INFO L93 Difference]: Finished difference Result 842 states and 1243 transitions. [2023-12-02 19:37:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 788 states. [2023-12-02 19:37:53,248 INFO L78 Accepts]: Start accepts. Automaton has has 789 states, 789 states have (on average 1.0114068441064639) internal successors, (798), 788 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2023-12-02 19:37:53,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:37:53,254 INFO L225 Difference]: With dead ends: 842 [2023-12-02 19:37:53,254 INFO L226 Difference]: Without dead ends: 815 [2023-12-02 19:37:53,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1649 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 794 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9822 ImplicationChecksByTransitivity, 219.1s TimeCoverageRelationStatistics Valid=310891, Invalid=321929, Unknown=0, NotChecked=0, Total=632820 [2023-12-02 19:37:53,301 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:37:53,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 19:37:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-12-02 19:37:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 815. [2023-12-02 19:37:53,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.0061425061425062) internal successors, (819), 814 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:37:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 819 transitions. [2023-12-02 19:37:53,333 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 819 transitions. Word has length 419 [2023-12-02 19:37:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:37:53,333 INFO L495 AbstractCegarLoop]: Abstraction has 815 states and 819 transitions. [2023-12-02 19:37:53,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 789 states, 789 states have (on average 1.0114068441064639) internal successors, (798), 788 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:37:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 819 transitions. [2023-12-02 19:37:53,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2023-12-02 19:37:53,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:37:53,355 INFO L195 NwaCegarLoop]: trace histogram [786, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:37:53,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 19:37:53,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_92e720e1-ff81-4a4e-b1f9-46a4c1fdda2f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 19:37:53,556 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:37:53,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:37:53,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1524800238, now seen corresponding path program 11 times [2023-12-02 19:37:53,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:37:53,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73815024] [2023-12-02 19:37:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:37:53,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:37:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat