./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c --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_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91 --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 3d9847fe213bf8df5d23c53d2bc8b53fb384c85820b87c09591484702dabefc3 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:08:36,103 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:08:36,218 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:08:36,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:08:36,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:08:36,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:08:36,263 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:08:36,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:08:36,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:08:36,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:08:36,266 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:08:36,266 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:08:36,267 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:08:36,268 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:08:36,268 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:08:36,269 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:08:36,269 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:08:36,270 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:08:36,271 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:08:36,271 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:08:36,272 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:08:36,273 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:08:36,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:08:36,274 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:08:36,275 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:08:36,275 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:08:36,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:08:36,276 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:08:36,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:08:36,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:08:36,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:08:36,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:08:36,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:08:36,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:08:36,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:08:36,279 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:08:36,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:08:36,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:36,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:08:36,281 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:08:36,281 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:08:36,281 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:08:36,282 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:08:36,282 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:08:36,282 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:08:36,282 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:08:36,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:08:36,283 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_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d9847fe213bf8df5d23c53d2bc8b53fb384c85820b87c09591484702dabefc3 [2023-11-25 00:08:36,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:08:36,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:08:36,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:08:36,631 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:08:36,632 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:08:36,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2023-11-25 00:08:39,808 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:08:40,035 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:08:40,036 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2023-11-25 00:08:40,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/data/a3d8c37a4/aed2dcb5c8fa4c55a4241b4af071a675/FLAG61a058726 [2023-11-25 00:08:40,060 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/data/a3d8c37a4/aed2dcb5c8fa4c55a4241b4af071a675 [2023-11-25 00:08:40,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:08:40,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:08:40,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:40,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:08:40,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:08:40,076 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1161c7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40, skipping insertion in model container [2023-11-25 00:08:40,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:08:40,266 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_1670540b-1c16-40e7-b3aa-a6920ae9ea54/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2023-11-25 00:08:40,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:40,306 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:08:40,328 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_1670540b-1c16-40e7-b3aa-a6920ae9ea54/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2023-11-25 00:08:40,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:40,354 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:08:40,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40 WrapperNode [2023-11-25 00:08:40,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:40,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:40,356 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:08:40,357 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:08:40,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,395 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2023-11-25 00:08:40,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:40,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:08:40,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:08:40,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:08:40,406 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,413 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:08:40,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:08:40,423 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:08:40,423 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:08:40,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (1/1) ... [2023-11-25 00:08:40,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:40,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:40,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:08:40,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:08:40,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:08:40,513 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:08:40,513 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:08:40,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:08:40,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:08:40,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:08:40,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:08:40,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:08:40,588 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:08:40,590 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:08:40,757 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:08:40,818 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:08:40,819 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:08:40,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:40 BoogieIcfgContainer [2023-11-25 00:08:40,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:08:40,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:08:40,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:08:40,833 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:08:40,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:08:40" (1/3) ... [2023-11-25 00:08:40,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456da0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:40, skipping insertion in model container [2023-11-25 00:08:40,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:40" (2/3) ... [2023-11-25 00:08:40,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@456da0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:40, skipping insertion in model container [2023-11-25 00:08:40,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:40" (3/3) ... [2023-11-25 00:08:40,844 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.c [2023-11-25 00:08:40,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:08:40,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:08:40,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:08:40,921 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;@376491e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:08:40,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:08:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-25 00:08:40,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-25 00:08:40,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:40,936 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:40,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:40,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2040384688, now seen corresponding path program 1 times [2023-11-25 00:08:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:40,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318340854] [2023-11-25 00:08:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:41,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:08:41,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079252252] [2023-11-25 00:08:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:41,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:41,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:41,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:41,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:08:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:41,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-25 00:08:41,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-25 00:08:41,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:41,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318340854] [2023-11-25 00:08:41,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:08:41,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079252252] [2023-11-25 00:08:41,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079252252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:41,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:41,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:08:41,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673430637] [2023-11-25 00:08:41,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:41,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:08:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:08:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:41,557 INFO L87 Difference]: Start difference. First operand has 26 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:08:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:41,774 INFO L93 Difference]: Finished difference Result 57 states and 99 transitions. [2023-11-25 00:08:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:08:41,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2023-11-25 00:08:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:41,787 INFO L225 Difference]: With dead ends: 57 [2023-11-25 00:08:41,787 INFO L226 Difference]: Without dead ends: 37 [2023-11-25 00:08:41,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:41,794 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:41,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 105 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:08:41,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-25 00:08:41,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-25 00:08:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-25 00:08:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2023-11-25 00:08:41,845 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 51 transitions. Word has length 20 [2023-11-25 00:08:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:41,846 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 51 transitions. [2023-11-25 00:08:41,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-25 00:08:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2023-11-25 00:08:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-25 00:08:41,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:41,849 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:41,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:42,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:08:42,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:42,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash -879048764, now seen corresponding path program 1 times [2023-11-25 00:08:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:42,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746173050] [2023-11-25 00:08:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:42,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:08:42,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058121543] [2023-11-25 00:08:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:42,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:42,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:42,081 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:42,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:08:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:42,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-25 00:08:42,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-25 00:08:42,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:08:42,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746173050] [2023-11-25 00:08:42,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:08:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058121543] [2023-11-25 00:08:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058121543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:42,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837290101] [2023-11-25 00:08:42,659 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-25 00:08:42,659 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:08:42,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:08:42,668 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:08:42,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:08:43,710 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-11-25 00:08:43,733 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-25 00:08:43,736 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:08:44,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [837290101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:44,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:44,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 21 [2023-11-25 00:08:44,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849250652] [2023-11-25 00:08:44,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:44,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-25 00:08:44,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:44,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-25 00:08:44,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:08:44,615 INFO L87 Difference]: Start difference. First operand 36 states and 51 transitions. Second operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-25 00:08:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:44,895 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-11-25 00:08:44,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:08:44,896 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 25 [2023-11-25 00:08:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:44,898 INFO L225 Difference]: With dead ends: 43 [2023-11-25 00:08:44,898 INFO L226 Difference]: Without dead ends: 39 [2023-11-25 00:08:44,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:08:44,901 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:44,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:08:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-25 00:08:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-25 00:08:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-25 00:08:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2023-11-25 00:08:44,923 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 25 [2023-11-25 00:08:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:44,923 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2023-11-25 00:08:44,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.25) internal successors, (10), 6 states have internal predecessors, (10), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-25 00:08:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2023-11-25 00:08:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-25 00:08:44,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:44,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:44,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:45,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:45,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:45,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1140127173, now seen corresponding path program 1 times [2023-11-25 00:08:45,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:45,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008327136] [2023-11-25 00:08:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:45,153 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:08:45,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090655846] [2023-11-25 00:08:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:45,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:45,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:45,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:45,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:08:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:45,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:08:45,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-25 00:08:45,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:08:45,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:45,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008327136] [2023-11-25 00:08:45,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:08:45,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090655846] [2023-11-25 00:08:45,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090655846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:45,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:45,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:08:45,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314977777] [2023-11-25 00:08:45,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:45,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:08:45,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:08:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:08:45,263 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-25 00:08:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:45,323 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-11-25 00:08:45,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:08:45,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 36 [2023-11-25 00:08:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:45,326 INFO L225 Difference]: With dead ends: 45 [2023-11-25 00:08:45,326 INFO L226 Difference]: Without dead ends: 43 [2023-11-25 00:08:45,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:08:45,328 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:45,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:08:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-25 00:08:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-25 00:08:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-25 00:08:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2023-11-25 00:08:45,349 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 36 [2023-11-25 00:08:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:45,350 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2023-11-25 00:08:45,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-25 00:08:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2023-11-25 00:08:45,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-25 00:08:45,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:45,353 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:45,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:45,560 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:45,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1417905632, now seen corresponding path program 1 times [2023-11-25 00:08:45,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:45,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639302090] [2023-11-25 00:08:45,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:45,580 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:08:45,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712012627] [2023-11-25 00:08:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:45,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:45,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:08:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:45,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-25 00:08:45,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-25 00:08:45,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:08:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-25 00:08:46,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639302090] [2023-11-25 00:08:46,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:08:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712012627] [2023-11-25 00:08:46,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712012627] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:46,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:08:46,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-25 00:08:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011427714] [2023-11-25 00:08:46,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:46,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:08:46,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:46,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:08:46,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:08:46,141 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:46,213 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-11-25 00:08:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:08:46,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 37 [2023-11-25 00:08:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:46,217 INFO L225 Difference]: With dead ends: 49 [2023-11-25 00:08:46,217 INFO L226 Difference]: Without dead ends: 47 [2023-11-25 00:08:46,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:08:46,221 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:46,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 89 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:08:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-25 00:08:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-25 00:08:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-25 00:08:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-11-25 00:08:46,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 37 [2023-11-25 00:08:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:46,259 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-11-25 00:08:46,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-25 00:08:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-11-25 00:08:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-25 00:08:46,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:46,263 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:46,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:08:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:46,482 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:46,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1922069073, now seen corresponding path program 1 times [2023-11-25 00:08:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:46,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634755523] [2023-11-25 00:08:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:46,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:46,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:08:46,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787220238] [2023-11-25 00:08:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:46,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:46,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:46,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:08:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:46,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-25 00:08:46,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-25 00:08:46,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:08:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-25 00:08:46,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634755523] [2023-11-25 00:08:46,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:08:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787220238] [2023-11-25 00:08:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787220238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:08:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458865680] [2023-11-25 00:08:46,810 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-25 00:08:46,810 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:08:46,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:08:46,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:08:46,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:08:47,510 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2023-11-25 00:08:47,524 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-25 00:08:47,526 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:08:48,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [458865680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:48,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:08:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [9, 8] total 24 [2023-11-25 00:08:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610175380] [2023-11-25 00:08:48,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:48,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-25 00:08:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-25 00:08:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:08:48,503 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 14 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-25 00:08:48,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:48,805 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-11-25 00:08:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-25 00:08:48,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 41 [2023-11-25 00:08:48,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:48,807 INFO L225 Difference]: With dead ends: 57 [2023-11-25 00:08:48,807 INFO L226 Difference]: Without dead ends: 45 [2023-11-25 00:08:48,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:08:48,812 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:48,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 45 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:08:48,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-25 00:08:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-25 00:08:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-25 00:08:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2023-11-25 00:08:48,833 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 41 [2023-11-25 00:08:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:48,834 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2023-11-25 00:08:48,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-25 00:08:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2023-11-25 00:08:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-25 00:08:48,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:48,835 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:48,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-25 00:08:49,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:49,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:49,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1662237964, now seen corresponding path program 2 times [2023-11-25 00:08:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:49,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150710651] [2023-11-25 00:08:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:49,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:08:49,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856091880] [2023-11-25 00:08:49,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:08:49,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:49,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:49,068 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:49,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:08:49,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:08:49,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:08:49,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-25 00:08:49,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-25 00:08:49,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:08:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-25 00:08:49,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:49,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150710651] [2023-11-25 00:08:49,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:08:49,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856091880] [2023-11-25 00:08:49,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856091880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:08:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780184180] [2023-11-25 00:08:49,934 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-25 00:08:49,935 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:08:49,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:08:49,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:08:49,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:08:52,538 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-25 00:08:52,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-25 00:08:52,544 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:08:54,983 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_main_~r~0#1_39| Int) (|v_ULTIMATE.start_main_~p~0#1_39| Int) (|v_ULTIMATE.start_main_~b~0#1_39| Int) (|v_ULTIMATE.start_main_~s~0#1_37| Int) (|v_ULTIMATE.start_main_~q~0#1_37| Int) (|v_ULTIMATE.start_main_~a~0#1_37| Int)) (and (or (and (= |c_ULTIMATE.start_main_~p~0#1| |v_ULTIMATE.start_main_~p~0#1_39|) (= |v_ULTIMATE.start_main_~s~0#1_37| (+ |v_ULTIMATE.start_main_~r~0#1_39| |c_ULTIMATE.start_main_~s~0#1|)) (= |v_ULTIMATE.start_main_~q~0#1_37| (+ |v_ULTIMATE.start_main_~p~0#1_39| |c_ULTIMATE.start_main_~q~0#1|)) (= |c_ULTIMATE.start_main_~r~0#1| |v_ULTIMATE.start_main_~r~0#1_39|) (= |c_ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_37|) (<= |v_ULTIMATE.start_main_~a~0#1_37| |v_ULTIMATE.start_main_~b~0#1_39|) (= |v_ULTIMATE.start_main_~b~0#1_39| (+ |v_ULTIMATE.start_main_~a~0#1_37| |c_ULTIMATE.start_main_~b~0#1|))) (and (= |v_ULTIMATE.start_main_~s~0#1_37| |c_ULTIMATE.start_main_~s~0#1|) (= |v_ULTIMATE.start_main_~a~0#1_37| (+ |v_ULTIMATE.start_main_~b~0#1_39| |c_ULTIMATE.start_main_~a~0#1|)) (<= (+ |v_ULTIMATE.start_main_~b~0#1_39| 1) |v_ULTIMATE.start_main_~a~0#1_37|) (= |v_ULTIMATE.start_main_~b~0#1_39| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |v_ULTIMATE.start_main_~q~0#1_37| |c_ULTIMATE.start_main_~p~0#1|) |v_ULTIMATE.start_main_~p~0#1_39|) (= |v_ULTIMATE.start_main_~q~0#1_37| |c_ULTIMATE.start_main_~q~0#1|) (= (+ |v_ULTIMATE.start_main_~s~0#1_37| |c_ULTIMATE.start_main_~r~0#1|) |v_ULTIMATE.start_main_~r~0#1_39|))) (not (= |v_ULTIMATE.start_main_~b~0#1_39| |v_ULTIMATE.start_main_~a~0#1_37|)))) (let ((.cse0 (select |c_#memory_int| 1))) (and (<= |c_ULTIMATE.start_main_~y~0#1| 10) (= (select |c_#valid| 0) 0) (= (select |c_#valid| 3) 1) (= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= 2 (select |c_#length| 1)) (= (select |c_#valid| 1) 1) (= (select |c_#length| 2) 10) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~a~0#1|) (= |c_ULTIMATE.start_main_~p~0#1| 1) (= |c_ULTIMATE.start_main_~s~0#1| 1) (<= 1 |c_ULTIMATE.start_main_~x~0#1|) (= (select |c_#valid| 2) 1) (= (select .cse0 1) 0) (= 0 |c_ULTIMATE.start_main_~q~0#1|) (<= 1 |c_ULTIMATE.start_main_~y~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| 0) (<= |c_ULTIMATE.start_main_~x~0#1| 10) (= (select |c_#length| 3) 12) (= 48 (select .cse0 0))))) is different from true [2023-11-25 00:08:59,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1770#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-25 00:08:59,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:08:59,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:08:59,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-11-25 00:08:59,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196789799] [2023-11-25 00:08:59,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:08:59,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:08:59,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:08:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=513, Unknown=2, NotChecked=46, Total=650 [2023-11-25 00:08:59,023 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-25 00:09:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:00,615 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2023-11-25 00:09:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:09:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 42 [2023-11-25 00:09:00,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:00,617 INFO L225 Difference]: With dead ends: 69 [2023-11-25 00:09:00,617 INFO L226 Difference]: Without dead ends: 67 [2023-11-25 00:09:00,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=118, Invalid=696, Unknown=2, NotChecked=54, Total=870 [2023-11-25 00:09:00,619 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:00,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 180 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:09:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-25 00:09:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2023-11-25 00:09:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 1.1) internal successors, (33), 32 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-25 00:09:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-25 00:09:00,660 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 42 [2023-11-25 00:09:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:00,661 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-25 00:09:00,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-11-25 00:09:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-25 00:09:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-25 00:09:00,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:00,663 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:00,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:09:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:00,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:00,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash -335940000, now seen corresponding path program 3 times [2023-11-25 00:09:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:00,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085044224] [2023-11-25 00:09:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:00,879 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:00,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547330070] [2023-11-25 00:09:00,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:09:00,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:00,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:00,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:00,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:09:00,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:09:00,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:09:00,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-25 00:09:00,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-25 00:09:01,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:09:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-25 00:09:02,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085044224] [2023-11-25 00:09:02,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547330070] [2023-11-25 00:09:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547330070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:09:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680083738] [2023-11-25 00:09:02,573 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-25 00:09:02,573 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:09:02,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:09:02,573 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:09:02,573 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:09:05,004 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-25 00:09:05,008 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-25 00:09:05,010 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:09:07,623 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_main_~s~0#1_48| Int) (|v_ULTIMATE.start_main_~p~0#1_48| Int) (|v_ULTIMATE.start_main_~b~0#1_48| Int) (|v_ULTIMATE.start_main_~a~0#1_44| Int) (|v_ULTIMATE.start_main_~r~0#1_48| Int) (|v_ULTIMATE.start_main_~q~0#1_48| Int)) (and (or (and (= (+ |v_ULTIMATE.start_main_~q~0#1_48| |c_ULTIMATE.start_main_~p~0#1|) |v_ULTIMATE.start_main_~p~0#1_48|) (= |v_ULTIMATE.start_main_~b~0#1_48| |c_ULTIMATE.start_main_~b~0#1|) (= (+ |v_ULTIMATE.start_main_~b~0#1_48| |c_ULTIMATE.start_main_~a~0#1|) |v_ULTIMATE.start_main_~a~0#1_44|) (<= (+ |v_ULTIMATE.start_main_~b~0#1_48| 1) |v_ULTIMATE.start_main_~a~0#1_44|) (= |v_ULTIMATE.start_main_~q~0#1_48| |c_ULTIMATE.start_main_~q~0#1|) (= (+ |v_ULTIMATE.start_main_~s~0#1_48| |c_ULTIMATE.start_main_~r~0#1|) |v_ULTIMATE.start_main_~r~0#1_48|) (= |v_ULTIMATE.start_main_~s~0#1_48| |c_ULTIMATE.start_main_~s~0#1|)) (and (= |c_ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_44|) (= |c_ULTIMATE.start_main_~p~0#1| |v_ULTIMATE.start_main_~p~0#1_48|) (= |v_ULTIMATE.start_main_~q~0#1_48| (+ |v_ULTIMATE.start_main_~p~0#1_48| |c_ULTIMATE.start_main_~q~0#1|)) (= |c_ULTIMATE.start_main_~r~0#1| |v_ULTIMATE.start_main_~r~0#1_48|) (<= |v_ULTIMATE.start_main_~a~0#1_44| |v_ULTIMATE.start_main_~b~0#1_48|) (= (+ |v_ULTIMATE.start_main_~r~0#1_48| |c_ULTIMATE.start_main_~s~0#1|) |v_ULTIMATE.start_main_~s~0#1_48|) (= |v_ULTIMATE.start_main_~b~0#1_48| (+ |v_ULTIMATE.start_main_~a~0#1_44| |c_ULTIMATE.start_main_~b~0#1|)))) (not (= |v_ULTIMATE.start_main_~b~0#1_48| |v_ULTIMATE.start_main_~a~0#1_44|)))) (let ((.cse0 (select |c_#memory_int| 1))) (and (<= |c_ULTIMATE.start_main_~y~0#1| 10) (= (select |c_#valid| 0) 0) (= (select |c_#valid| 3) 1) (= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= 2 (select |c_#length| 1)) (= (select |c_#valid| 1) 1) (= (select |c_#length| 2) 10) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~a~0#1|) (= |c_ULTIMATE.start_main_~p~0#1| 1) (= |c_ULTIMATE.start_main_~s~0#1| 1) (<= 1 |c_ULTIMATE.start_main_~x~0#1|) (= (select |c_#valid| 2) 1) (= (select .cse0 1) 0) (= 0 |c_ULTIMATE.start_main_~q~0#1|) (<= 1 |c_ULTIMATE.start_main_~y~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| 0) (<= |c_ULTIMATE.start_main_~x~0#1| 10) (= (select |c_#length| 3) 12) (= 48 (select .cse0 0))))) is different from true [2023-11-25 00:09:13,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2280#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-25 00:09:13,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:09:13,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:09:13,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2023-11-25 00:09:13,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321585989] [2023-11-25 00:09:13,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:09:13,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-25 00:09:13,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:13,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-25 00:09:13,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=703, Unknown=3, NotChecked=54, Total=870 [2023-11-25 00:09:13,221 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-25 00:09:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:17,507 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2023-11-25 00:09:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:09:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 8 states have call successors, (16) Word has length 47 [2023-11-25 00:09:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:17,511 INFO L225 Difference]: With dead ends: 71 [2023-11-25 00:09:17,511 INFO L226 Difference]: Without dead ends: 65 [2023-11-25 00:09:17,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=4, NotChecked=64, Total=1190 [2023-11-25 00:09:17,513 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:17,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 220 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-25 00:09:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-25 00:09:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-25 00:09:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 38 states have internal predecessors, (39), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-25 00:09:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2023-11-25 00:09:17,537 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 47 [2023-11-25 00:09:17,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:17,538 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2023-11-25 00:09:17,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 8 states have call successors, (16) [2023-11-25 00:09:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2023-11-25 00:09:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-25 00:09:17,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:17,540 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:17,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:09:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-25 00:09:17,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:17,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1514449119, now seen corresponding path program 1 times [2023-11-25 00:09:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:17,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586688996] [2023-11-25 00:09:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:17,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:17,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355023621] [2023-11-25 00:09:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:17,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:17,770 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:17,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:09:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:17,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-25 00:09:17,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-25 00:09:18,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:09:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-25 00:09:18,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:09:18,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586688996] [2023-11-25 00:09:18,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:09:18,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355023621] [2023-11-25 00:09:18,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355023621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:09:18,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330614981] [2023-11-25 00:09:18,618 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-25 00:09:18,618 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:09:18,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:09:18,619 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:09:18,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:09:20,751 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-11-25 00:09:20,762 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2023-11-25 00:09:20,765 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:09:23,958 WARN L876 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_main_~a~0#1_52| Int) (|v_ULTIMATE.start_main_~r~0#1_54| Int) (|v_ULTIMATE.start_main_~s~0#1_52| Int) (|v_ULTIMATE.start_main_~p~0#1_54| Int) (|v_ULTIMATE.start_main_~q~0#1_52| Int) (|v_ULTIMATE.start_main_~b~0#1_54| Int)) (and (not (= |v_ULTIMATE.start_main_~b~0#1_54| |v_ULTIMATE.start_main_~a~0#1_52|)) (or (and (<= (+ |v_ULTIMATE.start_main_~b~0#1_54| 1) |v_ULTIMATE.start_main_~a~0#1_52|) (= |v_ULTIMATE.start_main_~b~0#1_54| |c_ULTIMATE.start_main_~b~0#1|) (= |v_ULTIMATE.start_main_~s~0#1_52| |c_ULTIMATE.start_main_~s~0#1|) (= (+ |v_ULTIMATE.start_main_~b~0#1_54| |c_ULTIMATE.start_main_~a~0#1|) |v_ULTIMATE.start_main_~a~0#1_52|) (= |v_ULTIMATE.start_main_~p~0#1_54| (+ |v_ULTIMATE.start_main_~q~0#1_52| |c_ULTIMATE.start_main_~p~0#1|)) (= |v_ULTIMATE.start_main_~q~0#1_52| |c_ULTIMATE.start_main_~q~0#1|) (= (+ |v_ULTIMATE.start_main_~s~0#1_52| |c_ULTIMATE.start_main_~r~0#1|) |v_ULTIMATE.start_main_~r~0#1_54|)) (and (= |c_ULTIMATE.start_main_~r~0#1| |v_ULTIMATE.start_main_~r~0#1_54|) (= |c_ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_52|) (= |v_ULTIMATE.start_main_~b~0#1_54| (+ |v_ULTIMATE.start_main_~a~0#1_52| |c_ULTIMATE.start_main_~b~0#1|)) (= |v_ULTIMATE.start_main_~s~0#1_52| (+ |v_ULTIMATE.start_main_~r~0#1_54| |c_ULTIMATE.start_main_~s~0#1|)) (<= |v_ULTIMATE.start_main_~a~0#1_52| |v_ULTIMATE.start_main_~b~0#1_54|) (= |c_ULTIMATE.start_main_~p~0#1| |v_ULTIMATE.start_main_~p~0#1_54|) (= |v_ULTIMATE.start_main_~q~0#1_52| (+ |v_ULTIMATE.start_main_~p~0#1_54| |c_ULTIMATE.start_main_~q~0#1|)))))) (let ((.cse0 (select |c_#memory_int| 1))) (and (<= |c_ULTIMATE.start_main_~y~0#1| 10) (= (select |c_#valid| 0) 0) (= (select |c_#valid| 3) 1) (= |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|) (= 2 (select |c_#length| 1)) (= (select |c_#valid| 1) 1) (= (select |c_#length| 2) 10) (<= 1 |c_#StackHeapBarrier|) (= |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~a~0#1|) (= |c_ULTIMATE.start_main_~p~0#1| 1) (= |c_ULTIMATE.start_main_~s~0#1| 1) (<= 1 |c_ULTIMATE.start_main_~x~0#1|) (= (select |c_#valid| 2) 1) (= (select .cse0 1) 0) (= 0 |c_ULTIMATE.start_main_~q~0#1|) (<= 1 |c_ULTIMATE.start_main_~y~0#1|) (= |c_ULTIMATE.start_main_~r~0#1| 0) (<= |c_ULTIMATE.start_main_~x~0#1| 10) (= (select |c_#length| 3) 12) (= 48 (select .cse0 0))))) is different from true [2023-11-25 00:09:28,321 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2858#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-25 00:09:28,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:09:28,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:09:28,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-11-25 00:09:28,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131620260] [2023-11-25 00:09:28,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:09:28,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:09:28,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:09:28,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:09:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=512, Unknown=2, NotChecked=46, Total=650 [2023-11-25 00:09:28,323 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-25 00:09:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:09:28,874 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2023-11-25 00:09:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:09:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 58 [2023-11-25 00:09:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:09:28,876 INFO L225 Difference]: With dead ends: 73 [2023-11-25 00:09:28,876 INFO L226 Difference]: Without dead ends: 61 [2023-11-25 00:09:28,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=99, Invalid=553, Unknown=2, NotChecked=48, Total=702 [2023-11-25 00:09:28,878 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:09:28,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 134 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:09:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-25 00:09:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-25 00:09:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-25 00:09:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-25 00:09:28,899 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 58 [2023-11-25 00:09:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:09:28,899 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-25 00:09:28,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2023-11-25 00:09:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-25 00:09:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-25 00:09:28,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:09:28,901 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:09:28,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-25 00:09:29,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-25 00:09:29,105 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:09:29,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:09:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 345062644, now seen corresponding path program 4 times [2023-11-25 00:09:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:09:29,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001292746] [2023-11-25 00:09:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:09:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:09:29,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:09:29,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380416757] [2023-11-25 00:09:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:09:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:09:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:09:29,120 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:09:29,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1670540b-1c16-40e7-b3aa-a6920ae9ea54/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-25 00:09:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:09:29,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-25 00:09:29,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:09:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 65 proven. 55 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-11-25 00:09:37,414 INFO L327 TraceCheckSpWp]: Computing backward predicates...