./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de41.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:46:36,976 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:46:37,047 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 17:46:37,051 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:46:37,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:46:37,077 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:46:37,077 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:46:37,078 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:46:37,079 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:46:37,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:46:37,080 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:46:37,080 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:46:37,081 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:46:37,081 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:46:37,082 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:46:37,082 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:46:37,083 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:46:37,083 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:46:37,084 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:46:37,084 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:46:37,085 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:46:37,086 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:46:37,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:46:37,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:46:37,087 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:46:37,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:46:37,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:46:37,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:46:37,089 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:46:37,089 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:46:37,100 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:46:37,100 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:46:37,101 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:46:37,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:46:37,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:46:37,101 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:46:37,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:46:37,102 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:46:37,102 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:46:37,102 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:46:37,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:46:37,103 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:46:37,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:46:37,103 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:46:37,104 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:46:37,104 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:46:37,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:46:37,104 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_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2023-12-02 17:46:37,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:46:37,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:46:37,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:46:37,355 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:46:37,356 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:46:37,357 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/loops-crafted-1/in-de41.c [2023-12-02 17:46:40,053 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:46:40,203 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:46:40,204 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/sv-benchmarks/c/loops-crafted-1/in-de41.c [2023-12-02 17:46:40,210 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/data/e21765518/19c9117beb9e451fa267577d85e70a97/FLAG023bb18bf [2023-12-02 17:46:40,222 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/data/e21765518/19c9117beb9e451fa267577d85e70a97 [2023-12-02 17:46:40,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:46:40,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:46:40,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:46:40,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:46:40,230 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:46:40,231 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,232 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7a3b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40, skipping insertion in model container [2023-12-02 17:46:40,232 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,249 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:46:40,363 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_89722f32-4fc5-4601-b2ac-ddc81aad6c49/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2023-12-02 17:46:40,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:46:40,382 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:46:40,392 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_89722f32-4fc5-4601-b2ac-ddc81aad6c49/sv-benchmarks/c/loops-crafted-1/in-de41.c[368,381] [2023-12-02 17:46:40,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:46:40,406 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:46:40,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40 WrapperNode [2023-12-02 17:46:40,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:46:40,408 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:46:40,408 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:46:40,408 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:46:40,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,434 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-12-02 17:46:40,435 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:46:40,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:46:40,436 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:46:40,436 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:46:40,442 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,444 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,452 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:46:40,455 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:46:40,455 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:46:40,456 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:46:40,457 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (1/1) ... [2023-12-02 17:46:40,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:46:40,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:40,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:46:40,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:46:40,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:46:40,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:46:40,582 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:46:40,585 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:46:40,699 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:46:40,733 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:46:40,734 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 17:46:40,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:46:40 BoogieIcfgContainer [2023-12-02 17:46:40,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:46:40,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:46:40,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:46:40,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:46:40,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:46:40" (1/3) ... [2023-12-02 17:46:40,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16708c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:46:40, skipping insertion in model container [2023-12-02 17:46:40,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:46:40" (2/3) ... [2023-12-02 17:46:40,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16708c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:46:40, skipping insertion in model container [2023-12-02 17:46:40,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:46:40" (3/3) ... [2023-12-02 17:46:40,745 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2023-12-02 17:46:40,764 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:46:40,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:46:40,801 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:46:40,806 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;@10a1b6f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:46:40,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:46:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:46:40,816 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:40,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:40,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:40,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:40,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1978268067, now seen corresponding path program 1 times [2023-12-02 17:46:40,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:40,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756189643] [2023-12-02 17:46:40,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:40,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:41,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:41,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756189643] [2023-12-02 17:46:41,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756189643] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:46:41,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:46:41,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:46:41,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355836162] [2023-12-02 17:46:41,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:46:41,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:46:41,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:41,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:46:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:46:41,415 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:41,489 INFO L93 Difference]: Finished difference Result 23 states and 34 transitions. [2023-12-02 17:46:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:46:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 17:46:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:41,499 INFO L225 Difference]: With dead ends: 23 [2023-12-02 17:46:41,500 INFO L226 Difference]: Without dead ends: 10 [2023-12-02 17:46:41,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:46:41,506 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:41,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:46:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-02 17:46:41,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-02 17:46:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2023-12-02 17:46:41,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 7 [2023-12-02 17:46:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:41,536 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2023-12-02 17:46:41,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2023-12-02 17:46:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 17:46:41,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:41,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:41,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:46:41,538 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:41,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1778622387, now seen corresponding path program 1 times [2023-12-02 17:46:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:41,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339625711] [2023-12-02 17:46:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:41,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:41,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339625711] [2023-12-02 17:46:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339625711] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:46:41,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:46:41,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:46:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812615409] [2023-12-02 17:46:41,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:46:41,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:46:41,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:46:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:46:41,601 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:41,632 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2023-12-02 17:46:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:46:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 17:46:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:41,634 INFO L225 Difference]: With dead ends: 16 [2023-12-02 17:46:41,634 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 17:46:41,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:46:41,636 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:41,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:46:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 17:46:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-02 17:46:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2023-12-02 17:46:41,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 8 [2023-12-02 17:46:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:41,641 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2023-12-02 17:46:41,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2023-12-02 17:46:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 17:46:41,642 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:41,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:41,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:46:41,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:41,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash 554704646, now seen corresponding path program 1 times [2023-12-02 17:46:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:41,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709916103] [2023-12-02 17:46:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:41,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:41,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:41,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709916103] [2023-12-02 17:46:41,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709916103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:41,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879443846] [2023-12-02 17:46:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:41,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:41,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:41,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:46:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:41,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 17:46:41,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:41,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:41,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879443846] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:41,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897176095] [2023-12-02 17:46:41,866 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:41,867 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:41,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:41,876 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:41,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:42,061 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:42,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~z~0#1| 4294967296) 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:42,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:42,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:42,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-12-02 17:46:42,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349716055] [2023-12-02 17:46:42,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:42,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:46:42,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:46:42,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:46:42,225 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:42,381 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2023-12-02 17:46:42,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:46:42,382 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 17:46:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:42,384 INFO L225 Difference]: With dead ends: 48 [2023-12-02 17:46:42,384 INFO L226 Difference]: Without dead ends: 43 [2023-12-02 17:46:42,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:46:42,387 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:42,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 17 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:46:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-02 17:46:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 19. [2023-12-02 17:46:42,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2023-12-02 17:46:42,395 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 8 [2023-12-02 17:46:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:42,395 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 27 transitions. [2023-12-02 17:46:42,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:42,396 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 27 transitions. [2023-12-02 17:46:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 17:46:42,396 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:42,396 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:42,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:46:42,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:42,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:42,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:42,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1791919755, now seen corresponding path program 1 times [2023-12-02 17:46:42,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:42,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654401709] [2023-12-02 17:46:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:42,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:46:42,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:42,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654401709] [2023-12-02 17:46:42,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654401709] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:42,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225959760] [2023-12-02 17:46:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:42,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:42,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:42,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:42,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:46:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:42,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:46:42,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:46:42,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:46:42,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225959760] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:42,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023372416] [2023-12-02 17:46:42,796 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:42,796 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:42,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:42,796 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:42,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:42,921 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:42,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '344#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:42,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:42,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:42,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-02 17:46:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254410330] [2023-12-02 17:46:42,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:42,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:46:42,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:46:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:46:42,999 INFO L87 Difference]: Start difference. First operand 19 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:43,047 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2023-12-02 17:46:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:46:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 17:46:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:43,048 INFO L225 Difference]: With dead ends: 33 [2023-12-02 17:46:43,049 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 17:46:43,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:46:43,050 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:43,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:46:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 17:46:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-12-02 17:46:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2023-12-02 17:46:43,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 10 [2023-12-02 17:46:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:43,061 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2023-12-02 17:46:43,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2023-12-02 17:46:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 17:46:43,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:43,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:43,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:46:43,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:43,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:43,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash 284392619, now seen corresponding path program 1 times [2023-12-02 17:46:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:43,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175447948] [2023-12-02 17:46:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:43,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:43,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:43,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175447948] [2023-12-02 17:46:43,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175447948] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:43,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123836435] [2023-12-02 17:46:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:43,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:43,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:43,637 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:43,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:46:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:43,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 17:46:43,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:43,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:44,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123836435] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:44,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591795825] [2023-12-02 17:46:44,113 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:44,114 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:44,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:44,114 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:44,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:44,255 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:44,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '538#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:44,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:44,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:44,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-12-02 17:46:44,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378541003] [2023-12-02 17:46:44,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:44,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:46:44,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:46:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:46:44,388 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:46,121 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2023-12-02 17:46:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:46:46,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 17:46:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:46,122 INFO L225 Difference]: With dead ends: 76 [2023-12-02 17:46:46,122 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 17:46:46,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=303, Invalid=1337, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:46:46,124 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:46,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 32 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 17:46:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 17:46:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 33. [2023-12-02 17:46:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.5625) internal successors, (50), 32 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 50 transitions. [2023-12-02 17:46:46,145 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 50 transitions. Word has length 11 [2023-12-02 17:46:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:46,145 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 50 transitions. [2023-12-02 17:46:46,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 50 transitions. [2023-12-02 17:46:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 17:46:46,146 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:46,146 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:46,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:46:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:46,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:46,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2077529955, now seen corresponding path program 2 times [2023-12-02 17:46:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:46,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80251729] [2023-12-02 17:46:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:46,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:46,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80251729] [2023-12-02 17:46:46,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80251729] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:46,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325172085] [2023-12-02 17:46:46,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:46:46,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:46,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:46,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:46,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:46:46,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:46:46,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:46,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:46:46,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:46,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325172085] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:46,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1172119690] [2023-12-02 17:46:46,562 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:46,563 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:46,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:46,563 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:46,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:46,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:46,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '847#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~z~0#1| 4294967296) 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:46,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:46,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:46,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-12-02 17:46:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138270788] [2023-12-02 17:46:46,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:46,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:46:46,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:46,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:46:46,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:46:46,806 INFO L87 Difference]: Start difference. First operand 33 states and 50 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:47,798 INFO L93 Difference]: Finished difference Result 144 states and 217 transitions. [2023-12-02 17:46:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 17:46:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 17:46:47,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:47,800 INFO L225 Difference]: With dead ends: 144 [2023-12-02 17:46:47,800 INFO L226 Difference]: Without dead ends: 135 [2023-12-02 17:46:47,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=990, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:46:47,802 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 199 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:47,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 77 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:46:47,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-02 17:46:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 55. [2023-12-02 17:46:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 81 transitions. [2023-12-02 17:46:47,831 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 81 transitions. Word has length 11 [2023-12-02 17:46:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:47,832 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 81 transitions. [2023-12-02 17:46:47,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 81 transitions. [2023-12-02 17:46:47,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:46:47,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:47,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:47,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:46:48,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:48,033 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:48,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash 225566773, now seen corresponding path program 2 times [2023-12-02 17:46:48,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:48,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825529782] [2023-12-02 17:46:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:48,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:46:48,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825529782] [2023-12-02 17:46:48,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825529782] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:48,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738890249] [2023-12-02 17:46:48,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:46:48,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:48,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:48,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:48,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:46:48,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:46:48,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:48,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:46:48,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:46:48,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:46:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738890249] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:48,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405670009] [2023-12-02 17:46:48,200 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:48,200 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:48,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:48,200 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:48,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:48,302 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:48,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1310#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:48,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:48,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:48,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-12-02 17:46:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774034001] [2023-12-02 17:46:48,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:46:48,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:46:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:46:48,352 INFO L87 Difference]: Start difference. First operand 55 states and 81 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:48,418 INFO L93 Difference]: Finished difference Result 66 states and 94 transitions. [2023-12-02 17:46:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:46:48,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 17:46:48,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:48,420 INFO L225 Difference]: With dead ends: 66 [2023-12-02 17:46:48,420 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 17:46:48,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 17:46:48,421 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:48,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:46:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 17:46:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-02 17:46:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 57 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 84 transitions. [2023-12-02 17:46:48,450 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 84 transitions. Word has length 12 [2023-12-02 17:46:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:48,450 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 84 transitions. [2023-12-02 17:46:48,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 84 transitions. [2023-12-02 17:46:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:46:48,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:48,451 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:48,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 17:46:48,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 17:46:48,656 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:48,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash 392822261, now seen corresponding path program 2 times [2023-12-02 17:46:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:48,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684536658] [2023-12-02 17:46:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:48,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:46:48,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684536658] [2023-12-02 17:46:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684536658] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046353565] [2023-12-02 17:46:48,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:46:48,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:48,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:48,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:46:48,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:46:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:48,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:46:48,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:46:48,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:46:48,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046353565] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:48,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692458125] [2023-12-02 17:46:48,853 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:48,853 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:48,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:48,853 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:48,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:48,925 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:49,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1629#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:49,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:49,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:49,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2023-12-02 17:46:49,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796001540] [2023-12-02 17:46:49,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:46:49,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:49,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:46:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:46:49,009 INFO L87 Difference]: Start difference. First operand 58 states and 84 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:49,105 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2023-12-02 17:46:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:46:49,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 17:46:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:49,106 INFO L225 Difference]: With dead ends: 79 [2023-12-02 17:46:49,106 INFO L226 Difference]: Without dead ends: 63 [2023-12-02 17:46:49,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:46:49,107 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:49,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:46:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-02 17:46:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-12-02 17:46:49,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.5) internal successors, (75), 50 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 75 transitions. [2023-12-02 17:46:49,133 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 75 transitions. Word has length 12 [2023-12-02 17:46:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:49,133 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 75 transitions. [2023-12-02 17:46:49,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 75 transitions. [2023-12-02 17:46:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:46:49,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:49,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:49,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 17:46:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 17:46:49,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:49,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:49,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1743905747, now seen corresponding path program 3 times [2023-12-02 17:46:49,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:49,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066628075] [2023-12-02 17:46:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:49,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:46:49,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:49,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066628075] [2023-12-02 17:46:49,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066628075] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:49,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130717053] [2023-12-02 17:46:49,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:46:49,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:49,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:49,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:49,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:46:49,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:46:49,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:49,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:46:49,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:46:49,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:46:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130717053] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105842290] [2023-12-02 17:46:49,522 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:49,522 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:49,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:49,522 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:49,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:49,608 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:49,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1968#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:49,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:49,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:49,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-12-02 17:46:49,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802536586] [2023-12-02 17:46:49,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:49,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 17:46:49,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:49,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 17:46:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:46:49,682 INFO L87 Difference]: Start difference. First operand 51 states and 75 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:49,832 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2023-12-02 17:46:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 17:46:49,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 17:46:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:49,833 INFO L225 Difference]: With dead ends: 95 [2023-12-02 17:46:49,833 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 17:46:49,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:46:49,834 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:49,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 40 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:46:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 17:46:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 49. [2023-12-02 17:46:49,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 48 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 71 transitions. [2023-12-02 17:46:49,859 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 71 transitions. Word has length 13 [2023-12-02 17:46:49,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:49,859 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 71 transitions. [2023-12-02 17:46:49,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:49,859 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 71 transitions. [2023-12-02 17:46:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:46:49,860 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:49,860 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:49,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 17:46:50,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 17:46:50,061 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:50,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash 654765789, now seen corresponding path program 3 times [2023-12-02 17:46:50,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:50,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209451508] [2023-12-02 17:46:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:50,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:46:50,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209451508] [2023-12-02 17:46:50,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209451508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:50,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997452660] [2023-12-02 17:46:50,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:46:50,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:50,157 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:50,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:46:50,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:46:50,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:50,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:46:50,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:46:50,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:46:50,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997452660] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:50,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289060818] [2023-12-02 17:46:50,265 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:50,265 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:50,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:50,265 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:50,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:50,340 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:50,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2317#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:50,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:50,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:50,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-12-02 17:46:50,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984291174] [2023-12-02 17:46:50,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:50,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:46:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:46:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:46:50,421 INFO L87 Difference]: Start difference. First operand 49 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:50,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:50,491 INFO L93 Difference]: Finished difference Result 69 states and 100 transitions. [2023-12-02 17:46:50,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:46:50,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 17:46:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:50,492 INFO L225 Difference]: With dead ends: 69 [2023-12-02 17:46:50,492 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 17:46:50,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:46:50,493 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:50,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:46:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 17:46:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2023-12-02 17:46:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 63 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2023-12-02 17:46:50,520 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 13 [2023-12-02 17:46:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:50,520 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2023-12-02 17:46:50,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2023-12-02 17:46:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 17:46:50,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:50,521 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:50,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:46:50,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:46:50,722 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:50,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2143263645, now seen corresponding path program 4 times [2023-12-02 17:46:50,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:50,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928280482] [2023-12-02 17:46:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:51,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:51,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928280482] [2023-12-02 17:46:51,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928280482] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:51,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977930585] [2023-12-02 17:46:51,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:46:51,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:51,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:51,352 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:51,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:46:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:51,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 17:46:51,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:51,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:46:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977930585] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573016197] [2023-12-02 17:46:52,142 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:52,142 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:52,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:52,143 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:52,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:52,226 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:52,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2690#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:52,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:52,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 9] total 28 [2023-12-02 17:46:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437947362] [2023-12-02 17:46:52,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 17:46:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 17:46:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:46:52,386 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:53,997 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2023-12-02 17:46:53,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 17:46:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 17:46:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:53,998 INFO L225 Difference]: With dead ends: 110 [2023-12-02 17:46:53,998 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 17:46:53,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 17:46:54,000 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:54,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 50 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 17:46:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 17:46:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 64. [2023-12-02 17:46:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.3968253968253967) internal successors, (88), 63 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2023-12-02 17:46:54,043 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 15 [2023-12-02 17:46:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:54,043 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 88 transitions. [2023-12-02 17:46:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 88 transitions. [2023-12-02 17:46:54,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 17:46:54,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:54,044 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:54,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 17:46:54,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 17:46:54,244 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:54,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1591341469, now seen corresponding path program 4 times [2023-12-02 17:46:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:54,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035474051] [2023-12-02 17:46:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:46:54,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:54,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035474051] [2023-12-02 17:46:54,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035474051] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:54,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042181725] [2023-12-02 17:46:54,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:46:54,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:54,336 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:54,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:46:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:54,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 17:46:54,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:46:54,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:46:54,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042181725] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:54,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942053871] [2023-12-02 17:46:54,537 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:54,537 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:54,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:54,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:54,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:54,608 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:54,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3149#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:54,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:54,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:54,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2023-12-02 17:46:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940920238] [2023-12-02 17:46:54,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:54,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:46:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:46:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:46:54,723 INFO L87 Difference]: Start difference. First operand 64 states and 88 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:54,938 INFO L93 Difference]: Finished difference Result 95 states and 122 transitions. [2023-12-02 17:46:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:46:54,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 17:46:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:54,939 INFO L225 Difference]: With dead ends: 95 [2023-12-02 17:46:54,939 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 17:46:54,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:46:54,940 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:54,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:46:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 17:46:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2023-12-02 17:46:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.35) internal successors, (81), 60 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-12-02 17:46:54,973 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 15 [2023-12-02 17:46:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:54,973 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-12-02 17:46:54,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-12-02 17:46:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 17:46:54,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:54,974 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:54,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 17:46:55,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 17:46:55,175 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:55,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:55,175 INFO L85 PathProgramCache]: Analyzing trace with hash 375736181, now seen corresponding path program 5 times [2023-12-02 17:46:55,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:55,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383038418] [2023-12-02 17:46:55,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:55,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:46:55,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:55,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383038418] [2023-12-02 17:46:55,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383038418] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:55,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774711863] [2023-12-02 17:46:55,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:46:55,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:55,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:55,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:55,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:46:55,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:46:55,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:55,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:46:55,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:46:55,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:46:55,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774711863] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:55,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638171588] [2023-12-02 17:46:55,460 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:55,460 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:55,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:55,461 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:55,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:55,531 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:55,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3558#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:55,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:55,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:55,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-12-02 17:46:55,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370898553] [2023-12-02 17:46:55,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:55,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:46:55,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:55,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:46:55,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:46:55,624 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:55,753 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2023-12-02 17:46:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:46:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 17:46:55,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:55,754 INFO L225 Difference]: With dead ends: 84 [2023-12-02 17:46:55,754 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 17:46:55,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:46:55,755 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:55,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:46:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 17:46:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2023-12-02 17:46:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2023-12-02 17:46:55,817 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 16 [2023-12-02 17:46:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:55,817 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2023-12-02 17:46:55,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2023-12-02 17:46:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 17:46:55,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:55,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:55,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:46:56,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 17:46:56,019 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:56,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1788067303, now seen corresponding path program 5 times [2023-12-02 17:46:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:56,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199173197] [2023-12-02 17:46:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:56,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:46:56,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:56,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199173197] [2023-12-02 17:46:56,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199173197] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:56,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959429455] [2023-12-02 17:46:56,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:46:56,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:56,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:56,104 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:56,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:46:56,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:46:56,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:56,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:46:56,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:46:56,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:46:56,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959429455] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932832017] [2023-12-02 17:46:56,314 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:56,314 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:56,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:56,315 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:56,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:56,396 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:56,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3980#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:56,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:56,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:56,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-12-02 17:46:56,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720008690] [2023-12-02 17:46:56,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:56,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:46:56,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:56,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:46:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:46:56,485 INFO L87 Difference]: Start difference. First operand 73 states and 97 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:46:56,790 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2023-12-02 17:46:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 17:46:56,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 17:46:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:46:56,792 INFO L225 Difference]: With dead ends: 126 [2023-12-02 17:46:56,792 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 17:46:56,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:46:56,793 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:46:56,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 86 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:46:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 17:46:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2023-12-02 17:46:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:56,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2023-12-02 17:46:56,829 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 17 [2023-12-02 17:46:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:46:56,830 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2023-12-02 17:46:56,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:46:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2023-12-02 17:46:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 17:46:56,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:46:56,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:46:56,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:46:57,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:57,031 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:46:57,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:46:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash 206659563, now seen corresponding path program 6 times [2023-12-02 17:46:57,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:46:57,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273510913] [2023-12-02 17:46:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:46:57,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:46:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:46:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 17:46:57,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:46:57,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273510913] [2023-12-02 17:46:57,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273510913] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:46:57,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873742077] [2023-12-02 17:46:57,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:46:57,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:46:57,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:46:57,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:46:57,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:46:57,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:46:57,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:46:57,547 WARN L260 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 17:46:57,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:46:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:58,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:46:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:46:59,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873742077] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:46:59,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871975139] [2023-12-02 17:46:59,412 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:46:59,412 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:46:59,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:46:59,412 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:46:59,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:46:59,519 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:46:59,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4483#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:46:59,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:46:59,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:46:59,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 16] total 36 [2023-12-02 17:46:59,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55309001] [2023-12-02 17:46:59,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:46:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 17:46:59,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:46:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 17:46:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:46:59,720 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:05,040 INFO L93 Difference]: Finished difference Result 135 states and 169 transitions. [2023-12-02 17:47:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-02 17:47:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 17:47:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:05,041 INFO L225 Difference]: With dead ends: 135 [2023-12-02 17:47:05,041 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 17:47:05,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1135, Invalid=5671, Unknown=0, NotChecked=0, Total=6806 [2023-12-02 17:47:05,046 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 165 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:05,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 65 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 17:47:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 17:47:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 87. [2023-12-02 17:47:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.313953488372093) internal successors, (113), 86 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2023-12-02 17:47:05,105 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 19 [2023-12-02 17:47:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:05,106 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2023-12-02 17:47:05,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2023-12-02 17:47:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 17:47:05,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:05,107 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:05,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:47:05,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:05,311 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:05,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:05,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1284969639, now seen corresponding path program 6 times [2023-12-02 17:47:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408676475] [2023-12-02 17:47:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:05,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:47:05,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:05,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408676475] [2023-12-02 17:47:05,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408676475] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:05,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137125672] [2023-12-02 17:47:05,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:47:05,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:05,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:05,427 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:05,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:47:05,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:47:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:05,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:47:05,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:47:05,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 17:47:05,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137125672] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:05,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2042578996] [2023-12-02 17:47:05,728 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:05,728 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:05,728 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:05,728 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:05,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:05,795 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:05,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5119#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:05,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:05,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:05,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2023-12-02 17:47:05,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48983912] [2023-12-02 17:47:05,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:05,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 17:47:05,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:05,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 17:47:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:47:05,914 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:06,377 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2023-12-02 17:47:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:47:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 17:47:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:06,378 INFO L225 Difference]: With dead ends: 133 [2023-12-02 17:47:06,379 INFO L226 Difference]: Without dead ends: 107 [2023-12-02 17:47:06,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 17:47:06,380 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:06,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 44 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:47:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-12-02 17:47:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 67. [2023-12-02 17:47:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 66 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2023-12-02 17:47:06,427 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 19 [2023-12-02 17:47:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:06,427 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2023-12-02 17:47:06,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2023-12-02 17:47:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 17:47:06,427 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:06,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:06,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 17:47:06,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:06,628 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:06,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:06,628 INFO L85 PathProgramCache]: Analyzing trace with hash 339294045, now seen corresponding path program 7 times [2023-12-02 17:47:06,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023517296] [2023-12-02 17:47:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:06,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:06,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023517296] [2023-12-02 17:47:06,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023517296] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336830247] [2023-12-02 17:47:06,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:47:06,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:06,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:06,810 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:06,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:47:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:06,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 17:47:06,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:06,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336830247] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:06,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058545761] [2023-12-02 17:47:06,999 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:06,999 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:06,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:06,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:06,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:07,059 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:07,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5641#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:07,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:07,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:07,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2023-12-02 17:47:07,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090132001] [2023-12-02 17:47:07,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:07,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 17:47:07,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 17:47:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:47:07,146 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:07,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:07,359 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2023-12-02 17:47:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 17:47:07,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 17:47:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:07,360 INFO L225 Difference]: With dead ends: 93 [2023-12-02 17:47:07,360 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 17:47:07,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:47:07,361 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:07,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:47:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 17:47:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2023-12-02 17:47:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 75 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2023-12-02 17:47:07,416 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 19 [2023-12-02 17:47:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:07,416 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2023-12-02 17:47:07,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2023-12-02 17:47:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 17:47:07,417 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:07,417 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:07,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:47:07,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 17:47:07,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:07,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash -788455885, now seen corresponding path program 8 times [2023-12-02 17:47:07,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:07,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131128882] [2023-12-02 17:47:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:07,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:07,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:07,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131128882] [2023-12-02 17:47:07,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131128882] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:07,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259378617] [2023-12-02 17:47:07,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:47:07,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:07,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:07,739 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:07,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:47:07,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 17:47:07,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:07,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 17:47:07,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:07,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:08,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259378617] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:08,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968839955] [2023-12-02 17:47:08,120 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:08,120 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:08,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:08,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:08,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:08,181 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:08,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6114#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:08,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:08,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:08,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 27 [2023-12-02 17:47:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44492660] [2023-12-02 17:47:08,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:08,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:47:08,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:47:08,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:47:08,325 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:09,579 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2023-12-02 17:47:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-02 17:47:09,579 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 17:47:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:09,580 INFO L225 Difference]: With dead ends: 205 [2023-12-02 17:47:09,581 INFO L226 Difference]: Without dead ends: 182 [2023-12-02 17:47:09,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=551, Invalid=2311, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:47:09,583 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 177 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:09,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 84 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:47:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-02 17:47:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 77. [2023-12-02 17:47:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 76 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2023-12-02 17:47:09,644 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 20 [2023-12-02 17:47:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:09,644 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2023-12-02 17:47:09,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2023-12-02 17:47:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 17:47:09,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:09,645 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:09,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 17:47:09,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:47:09,845 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:09,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash 173438325, now seen corresponding path program 9 times [2023-12-02 17:47:09,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:09,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991207729] [2023-12-02 17:47:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:47:10,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991207729] [2023-12-02 17:47:10,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991207729] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101097841] [2023-12-02 17:47:10,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:47:10,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:10,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:10,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:10,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:47:10,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:47:10,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:10,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 17:47:10,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:47:10,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:47:10,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101097841] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:10,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17608211] [2023-12-02 17:47:10,244 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:10,244 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:10,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:10,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:10,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:10,307 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:10,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6830#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:10,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:10,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:10,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2023-12-02 17:47:10,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131851166] [2023-12-02 17:47:10,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:47:10,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:10,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:47:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:47:10,416 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:10,709 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2023-12-02 17:47:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 17:47:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 17:47:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:10,710 INFO L225 Difference]: With dead ends: 104 [2023-12-02 17:47:10,710 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 17:47:10,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:47:10,711 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:10,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 44 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:47:10,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 17:47:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 85. [2023-12-02 17:47:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 84 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:10,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2023-12-02 17:47:10,773 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 22 [2023-12-02 17:47:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:10,773 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2023-12-02 17:47:10,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:10,774 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2023-12-02 17:47:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 17:47:10,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:10,774 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:10,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 17:47:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:10,975 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:10,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1402880318, now seen corresponding path program 1 times [2023-12-02 17:47:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:10,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436865057] [2023-12-02 17:47:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:47:11,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:11,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436865057] [2023-12-02 17:47:11,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436865057] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:11,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767811115] [2023-12-02 17:47:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:11,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:11,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:11,148 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:11,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:47:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:11,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:47:11,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:47:11,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 17:47:11,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767811115] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:11,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 17:47:11,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13, 13] total 17 [2023-12-02 17:47:11,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955339233] [2023-12-02 17:47:11,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:47:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:47:11,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:11,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:47:11,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:47:11,276 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:11,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:11,372 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2023-12-02 17:47:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:47:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-02 17:47:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:11,373 INFO L225 Difference]: With dead ends: 94 [2023-12-02 17:47:11,373 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 17:47:11,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:47:11,374 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:11,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:47:11,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 17:47:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-12-02 17:47:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 77 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2023-12-02 17:47:11,439 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 22 [2023-12-02 17:47:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:11,439 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2023-12-02 17:47:11,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2023-12-02 17:47:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 17:47:11,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:11,440 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:11,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 17:47:11,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:11,640 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:11,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1898307363, now seen corresponding path program 7 times [2023-12-02 17:47:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:11,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624668608] [2023-12-02 17:47:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:11,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 17:47:12,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624668608] [2023-12-02 17:47:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624668608] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:12,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928693191] [2023-12-02 17:47:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:47:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:12,190 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:12,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:47:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:12,336 WARN L260 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 66 conjunts are in the unsatisfiable core [2023-12-02 17:47:12,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:47:13,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:47:15,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928693191] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:15,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [124512783] [2023-12-02 17:47:15,494 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:15,494 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:15,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:15,495 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:15,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:15,558 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:15,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7857#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:15,784 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:15,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:15,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 49 [2023-12-02 17:47:15,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461033764] [2023-12-02 17:47:15,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:15,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 17:47:15,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:15,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 17:47:15,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:47:15,786 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:22,269 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2023-12-02 17:47:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-12-02 17:47:22,270 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 17:47:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:22,271 INFO L225 Difference]: With dead ends: 112 [2023-12-02 17:47:22,271 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 17:47:22,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1246, Invalid=5396, Unknown=0, NotChecked=0, Total=6642 [2023-12-02 17:47:22,273 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 96 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:22,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 66 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 17:47:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 17:47:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2023-12-02 17:47:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 74 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2023-12-02 17:47:22,335 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 23 [2023-12-02 17:47:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:22,335 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2023-12-02 17:47:22,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 49 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2023-12-02 17:47:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 17:47:22,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:22,335 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:22,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 17:47:22,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:22,536 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:22,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash 13399659, now seen corresponding path program 8 times [2023-12-02 17:47:22,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:22,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841545266] [2023-12-02 17:47:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:22,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:47:22,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:22,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841545266] [2023-12-02 17:47:22,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841545266] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:22,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934651028] [2023-12-02 17:47:22,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:47:22,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:22,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:22,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:22,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:47:22,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 17:47:22,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:22,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 17:47:22,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:47:22,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:47:22,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934651028] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207631568] [2023-12-02 17:47:22,983 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:22,983 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:22,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:22,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:22,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:23,067 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:23,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8431#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:23,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:23,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:23,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 24 [2023-12-02 17:47:23,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794227834] [2023-12-02 17:47:23,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:23,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:47:23,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:47:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:47:23,184 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:23,818 INFO L93 Difference]: Finished difference Result 176 states and 210 transitions. [2023-12-02 17:47:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 17:47:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 17:47:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:23,821 INFO L225 Difference]: With dead ends: 176 [2023-12-02 17:47:23,821 INFO L226 Difference]: Without dead ends: 140 [2023-12-02 17:47:23,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 17:47:23,823 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:23,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 240 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:47:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-12-02 17:47:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 87. [2023-12-02 17:47:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.255813953488372) internal successors, (108), 86 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2023-12-02 17:47:23,898 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 23 [2023-12-02 17:47:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:23,899 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2023-12-02 17:47:23,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2023-12-02 17:47:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 17:47:23,899 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:23,899 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:23,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 17:47:24,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:24,100 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:24,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1933756610, now seen corresponding path program 10 times [2023-12-02 17:47:24,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:24,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306913926] [2023-12-02 17:47:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:24,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:47:24,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306913926] [2023-12-02 17:47:24,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306913926] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930781180] [2023-12-02 17:47:24,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:47:24,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:24,210 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:24,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:47:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:24,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:47:24,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:47:24,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:47:24,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930781180] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:24,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018669206] [2023-12-02 17:47:24,616 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:24,616 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:24,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:24,617 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:24,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:24,690 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:24,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9089#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:24,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:24,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:24,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-12-02 17:47:24,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458732850] [2023-12-02 17:47:24,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:24,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:47:24,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:47:24,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2023-12-02 17:47:24,813 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:30,028 INFO L93 Difference]: Finished difference Result 211 states and 263 transitions. [2023-12-02 17:47:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-02 17:47:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 17:47:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:30,030 INFO L225 Difference]: With dead ends: 211 [2023-12-02 17:47:30,030 INFO L226 Difference]: Without dead ends: 199 [2023-12-02 17:47:30,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2135 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=872, Invalid=6268, Unknown=0, NotChecked=0, Total=7140 [2023-12-02 17:47:30,032 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 161 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:30,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 122 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 17:47:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-12-02 17:47:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 118. [2023-12-02 17:47:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 117 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 145 transitions. [2023-12-02 17:47:30,148 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 145 transitions. Word has length 24 [2023-12-02 17:47:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:30,149 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 145 transitions. [2023-12-02 17:47:30,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 145 transitions. [2023-12-02 17:47:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 17:47:30,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:30,149 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:30,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 17:47:30,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 17:47:30,350 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:30,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash -750291101, now seen corresponding path program 9 times [2023-12-02 17:47:30,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:30,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887526840] [2023-12-02 17:47:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:30,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:47:30,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887526840] [2023-12-02 17:47:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887526840] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231980892] [2023-12-02 17:47:30,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:47:30,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:30,521 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:30,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:47:30,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:47:30,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:30,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:47:30,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:47:30,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:47:30,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231980892] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:30,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077838774] [2023-12-02 17:47:30,744 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:30,744 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:30,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:30,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:30,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:30,836 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:30,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9998#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:30,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:30,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:30,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 17 [2023-12-02 17:47:30,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202119007] [2023-12-02 17:47:30,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:30,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:47:30,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:47:30,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:47:30,951 INFO L87 Difference]: Start difference. First operand 118 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:31,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:31,708 INFO L93 Difference]: Finished difference Result 251 states and 306 transitions. [2023-12-02 17:47:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 17:47:31,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 17:47:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:31,709 INFO L225 Difference]: With dead ends: 251 [2023-12-02 17:47:31,709 INFO L226 Difference]: Without dead ends: 229 [2023-12-02 17:47:31,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:47:31,710 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:31,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 257 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:47:31,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-12-02 17:47:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 135. [2023-12-02 17:47:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2462686567164178) internal successors, (167), 134 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 167 transitions. [2023-12-02 17:47:31,843 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 167 transitions. Word has length 24 [2023-12-02 17:47:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:31,844 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 167 transitions. [2023-12-02 17:47:31,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 167 transitions. [2023-12-02 17:47:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 17:47:31,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:31,844 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:31,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 17:47:32,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 17:47:32,045 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:32,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:32,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1104011879, now seen corresponding path program 11 times [2023-12-02 17:47:32,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:32,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394057103] [2023-12-02 17:47:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:32,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:47:32,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394057103] [2023-12-02 17:47:32,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394057103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:32,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503720171] [2023-12-02 17:47:32,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:47:32,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:32,195 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:32,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 17:47:32,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:47:32,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:32,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 17:47:32,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:47:32,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 17:47:32,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503720171] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867662731] [2023-12-02 17:47:32,648 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:32,648 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:32,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:32,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:32,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:32,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:32,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10952#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:32,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:32,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:32,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 32 [2023-12-02 17:47:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651708669] [2023-12-02 17:47:32,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:32,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 17:47:32,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 17:47:32,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 17:47:32,831 INFO L87 Difference]: Start difference. First operand 135 states and 167 transitions. Second operand has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:35,556 INFO L93 Difference]: Finished difference Result 343 states and 395 transitions. [2023-12-02 17:47:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-02 17:47:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 17:47:35,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:35,558 INFO L225 Difference]: With dead ends: 343 [2023-12-02 17:47:35,558 INFO L226 Difference]: Without dead ends: 317 [2023-12-02 17:47:35,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=851, Invalid=3571, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 17:47:35,559 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 207 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:35,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 140 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 17:47:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-12-02 17:47:35,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 153. [2023-12-02 17:47:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.243421052631579) internal successors, (189), 152 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 189 transitions. [2023-12-02 17:47:35,716 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 189 transitions. Word has length 25 [2023-12-02 17:47:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:35,716 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 189 transitions. [2023-12-02 17:47:35,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.375) internal successors, (44), 32 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 189 transitions. [2023-12-02 17:47:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 17:47:35,717 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:35,717 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:35,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-02 17:47:35,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 17:47:35,917 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1829823299, now seen corresponding path program 10 times [2023-12-02 17:47:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:35,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492729580] [2023-12-02 17:47:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:35,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:47:36,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:36,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492729580] [2023-12-02 17:47:36,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492729580] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:36,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207341445] [2023-12-02 17:47:36,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:47:36,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:36,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:36,167 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:36,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:47:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:36,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 17:47:36,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:47:36,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-02 17:47:36,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207341445] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:36,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994326600] [2023-12-02 17:47:36,379 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:36,380 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:36,380 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:36,380 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:36,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:36,461 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:36,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12135#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:36,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:36,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2023-12-02 17:47:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057331111] [2023-12-02 17:47:36,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:36,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:47:36,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:47:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:47:36,561 INFO L87 Difference]: Start difference. First operand 153 states and 189 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:37,108 INFO L93 Difference]: Finished difference Result 191 states and 244 transitions. [2023-12-02 17:47:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 17:47:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 17:47:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:37,110 INFO L225 Difference]: With dead ends: 191 [2023-12-02 17:47:37,110 INFO L226 Difference]: Without dead ends: 188 [2023-12-02 17:47:37,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:47:37,110 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:37,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:47:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-12-02 17:47:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 174. [2023-12-02 17:47:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.2427745664739884) internal successors, (215), 173 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 215 transitions. [2023-12-02 17:47:37,297 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 215 transitions. Word has length 26 [2023-12-02 17:47:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:37,297 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 215 transitions. [2023-12-02 17:47:37,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 215 transitions. [2023-12-02 17:47:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 17:47:37,297 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:37,297 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:37,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-02 17:47:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 17:47:37,498 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:37,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1683907955, now seen corresponding path program 12 times [2023-12-02 17:47:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885444025] [2023-12-02 17:47:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:47:37,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:37,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885444025] [2023-12-02 17:47:37,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885444025] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:37,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698618523] [2023-12-02 17:47:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:47:37,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:37,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:37,673 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:37,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 17:47:37,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:47:37,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:37,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 17:47:37,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:47:37,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:47:38,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698618523] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:38,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386490119] [2023-12-02 17:47:38,205 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:38,205 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:38,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:38,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:38,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:38,269 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:38,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13049#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:38,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:38,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:38,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16] total 37 [2023-12-02 17:47:38,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74004429] [2023-12-02 17:47:38,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:38,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 17:47:38,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 17:47:38,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 17:47:38,425 INFO L87 Difference]: Start difference. First operand 174 states and 215 transitions. Second operand has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:44,484 INFO L93 Difference]: Finished difference Result 526 states and 602 transitions. [2023-12-02 17:47:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-02 17:47:44,485 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 17:47:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:44,488 INFO L225 Difference]: With dead ends: 526 [2023-12-02 17:47:44,488 INFO L226 Difference]: Without dead ends: 478 [2023-12-02 17:47:44,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2787 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1784, Invalid=8316, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 17:47:44,491 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 326 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:44,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 259 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 17:47:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-12-02 17:47:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 192. [2023-12-02 17:47:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2303664921465969) internal successors, (235), 191 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 235 transitions. [2023-12-02 17:47:44,712 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 235 transitions. Word has length 26 [2023-12-02 17:47:44,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:44,712 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 235 transitions. [2023-12-02 17:47:44,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 235 transitions. [2023-12-02 17:47:44,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 17:47:44,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:44,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:44,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 17:47:44,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 17:47:44,913 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:44,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:44,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1781689557, now seen corresponding path program 11 times [2023-12-02 17:47:44,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:44,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577196974] [2023-12-02 17:47:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:44,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:45,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577196974] [2023-12-02 17:47:45,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577196974] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684813318] [2023-12-02 17:47:45,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:47:45,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:45,544 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:45,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 17:47:45,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 17:47:45,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:45,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 17:47:45,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:46,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 17:47:47,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684813318] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:47,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [257198289] [2023-12-02 17:47:47,007 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:47,007 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:47,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:47,008 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:47,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:47,070 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:47,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14719#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:47,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:47,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:47,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2023-12-02 17:47:47,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64020551] [2023-12-02 17:47:47,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:47,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 17:47:47,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 17:47:47,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:47:47,267 INFO L87 Difference]: Start difference. First operand 192 states and 235 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:55,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:55,205 INFO L93 Difference]: Finished difference Result 289 states and 338 transitions. [2023-12-02 17:47:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 17:47:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 17:47:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:55,207 INFO L225 Difference]: With dead ends: 289 [2023-12-02 17:47:55,207 INFO L226 Difference]: Without dead ends: 285 [2023-12-02 17:47:55,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=422, Invalid=2440, Unknown=0, NotChecked=0, Total=2862 [2023-12-02 17:47:55,209 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:55,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 69 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:47:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-12-02 17:47:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 192. [2023-12-02 17:47:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2303664921465969) internal successors, (235), 191 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 235 transitions. [2023-12-02 17:47:55,471 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 235 transitions. Word has length 27 [2023-12-02 17:47:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:55,471 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 235 transitions. [2023-12-02 17:47:55,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 235 transitions. [2023-12-02 17:47:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:47:55,472 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:55,472 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:55,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 17:47:55,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 17:47:55,673 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:55,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:55,673 INFO L85 PathProgramCache]: Analyzing trace with hash 601528757, now seen corresponding path program 12 times [2023-12-02 17:47:55,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:55,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638796726] [2023-12-02 17:47:55,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:55,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:47:55,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:55,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638796726] [2023-12-02 17:47:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638796726] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:55,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512027483] [2023-12-02 17:47:55,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:47:55,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:55,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:55,811 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:55,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 17:47:55,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:47:55,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:47:55,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 17:47:55,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:47:55,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-02 17:47:56,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512027483] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2097134490] [2023-12-02 17:47:56,005 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:56,005 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:56,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:56,006 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:56,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:56,072 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:56,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15870#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:56,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:56,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:56,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-12-02 17:47:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643157913] [2023-12-02 17:47:56,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:56,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 17:47:56,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 17:47:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:47:56,144 INFO L87 Difference]: Start difference. First operand 192 states and 235 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:56,601 INFO L93 Difference]: Finished difference Result 224 states and 269 transitions. [2023-12-02 17:47:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 17:47:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 17:47:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:56,602 INFO L225 Difference]: With dead ends: 224 [2023-12-02 17:47:56,602 INFO L226 Difference]: Without dead ends: 193 [2023-12-02 17:47:56,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 15 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:47:56,603 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:56,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 31 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:47:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-12-02 17:47:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 185. [2023-12-02 17:47:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2282608695652173) internal successors, (226), 184 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 226 transitions. [2023-12-02 17:47:56,845 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 226 transitions. Word has length 28 [2023-12-02 17:47:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:56,845 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 226 transitions. [2023-12-02 17:47:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 226 transitions. [2023-12-02 17:47:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:47:56,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:56,846 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:56,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 17:47:57,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 17:47:57,046 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:57,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:57,046 INFO L85 PathProgramCache]: Analyzing trace with hash 592511861, now seen corresponding path program 13 times [2023-12-02 17:47:57,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:57,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016402876] [2023-12-02 17:47:57,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:57,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:47:57,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:57,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016402876] [2023-12-02 17:47:57,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016402876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:57,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767765195] [2023-12-02 17:47:57,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:47:57,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:57,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:57,329 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:57,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 17:47:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:57,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 17:47:57,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:47:57,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 17:47:57,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767765195] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:57,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128915862] [2023-12-02 17:47:57,605 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:57,605 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:57,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:57,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:57,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:57,669 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:57,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16866#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:57,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:57,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:57,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 23 [2023-12-02 17:47:57,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675410784] [2023-12-02 17:47:57,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:57,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 17:47:57,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:57,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 17:47:57,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:47:57,808 INFO L87 Difference]: Start difference. First operand 185 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:58,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:47:58,389 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2023-12-02 17:47:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:47:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 17:47:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:47:58,391 INFO L225 Difference]: With dead ends: 201 [2023-12-02 17:47:58,391 INFO L226 Difference]: Without dead ends: 198 [2023-12-02 17:47:58,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2023-12-02 17:47:58,392 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:47:58,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 69 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:47:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-02 17:47:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2023-12-02 17:47:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.2228260869565217) internal successors, (225), 184 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 225 transitions. [2023-12-02 17:47:58,647 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 225 transitions. Word has length 28 [2023-12-02 17:47:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:47:58,647 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 225 transitions. [2023-12-02 17:47:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:47:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 225 transitions. [2023-12-02 17:47:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:47:58,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:47:58,648 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:47:58,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 17:47:58,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:58,849 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:47:58,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:47:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1213829484, now seen corresponding path program 13 times [2023-12-02 17:47:58,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:47:58,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785869231] [2023-12-02 17:47:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:47:58,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:47:59,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:47:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785869231] [2023-12-02 17:47:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785869231] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:47:59,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374878270] [2023-12-02 17:47:59,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:47:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:47:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:47:59,055 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:47:59,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 17:47:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:47:59,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 17:47:59,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:47:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:47:59,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:47:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 17:47:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374878270] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:47:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170594856] [2023-12-02 17:47:59,621 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:47:59,621 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:47:59,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:47:59,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:47:59,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:47:59,688 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:47:59,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17831#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:47:59,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:47:59,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:47:59,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2023-12-02 17:47:59,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962022642] [2023-12-02 17:47:59,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:47:59,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 17:47:59,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:47:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 17:47:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 17:47:59,829 INFO L87 Difference]: Start difference. First operand 185 states and 225 transitions. Second operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:48:15,076 WARN L293 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:48:17,350 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296))) is different from false [2023-12-02 17:48:41,538 WARN L293 SmtUtils]: Spent 14.22s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:48:49,827 WARN L293 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:49:03,323 WARN L293 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:49:11,622 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:49:22,151 WARN L293 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 56 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:49:43,534 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296))) is different from false [2023-12-02 17:50:42,939 WARN L293 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 56 DAG size of output: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:52:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:52:06,973 INFO L93 Difference]: Finished difference Result 895 states and 1075 transitions. [2023-12-02 17:52:06,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2023-12-02 17:52:06,973 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-12-02 17:52:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:52:06,976 INFO L225 Difference]: With dead ends: 895 [2023-12-02 17:52:06,976 INFO L226 Difference]: Without dead ends: 836 [2023-12-02 17:52:06,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 16760 ImplicationChecksByTransitivity, 242.8s TimeCoverageRelationStatistics Valid=9267, Invalid=35049, Unknown=2, NotChecked=838, Total=45156 [2023-12-02 17:52:06,979 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1331 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:52:06,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 414 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 1403 Invalid, 0 Unknown, 69 Unchecked, 3.8s Time] [2023-12-02 17:52:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2023-12-02 17:52:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 225. [2023-12-02 17:52:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.2589285714285714) internal successors, (282), 224 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 282 transitions. [2023-12-02 17:52:07,340 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 282 transitions. Word has length 28 [2023-12-02 17:52:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:52:07,340 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 282 transitions. [2023-12-02 17:52:07,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:07,340 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 282 transitions. [2023-12-02 17:52:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 17:52:07,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:52:07,341 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:52:07,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-12-02 17:52:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:07,541 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:52:07,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:52:07,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2036305703, now seen corresponding path program 14 times [2023-12-02 17:52:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:52:07,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164109750] [2023-12-02 17:52:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:52:07,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:52:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:52:07,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:52:07,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164109750] [2023-12-02 17:52:07,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164109750] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:52:07,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550541161] [2023-12-02 17:52:07,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:52:07,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:07,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:52:07,701 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:52:07,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 17:52:08,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 17:52:08,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:52:08,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 17:52:08,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:52:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 17:52:08,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:52:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 17:52:08,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550541161] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:52:08,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581842152] [2023-12-02 17:52:08,306 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:52:08,306 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:52:08,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:52:08,306 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:52:08,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:52:08,377 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:52:08,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20516#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:52:08,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:52:08,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:52:08,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2023-12-02 17:52:08,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664482494] [2023-12-02 17:52:08,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:52:08,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 17:52:08,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:52:08,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 17:52:08,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:52:08,500 INFO L87 Difference]: Start difference. First operand 225 states and 282 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:10,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:52:10,256 INFO L93 Difference]: Finished difference Result 384 states and 443 transitions. [2023-12-02 17:52:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-02 17:52:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 17:52:10,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:52:10,258 INFO L225 Difference]: With dead ends: 384 [2023-12-02 17:52:10,258 INFO L226 Difference]: Without dead ends: 328 [2023-12-02 17:52:10,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=326, Invalid=2326, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:52:10,259 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:52:10,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 242 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:52:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-12-02 17:52:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 215. [2023-12-02 17:52:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.2429906542056075) internal successors, (266), 214 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 266 transitions. [2023-12-02 17:52:10,669 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 266 transitions. Word has length 29 [2023-12-02 17:52:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:52:10,669 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 266 transitions. [2023-12-02 17:52:10,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 266 transitions. [2023-12-02 17:52:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 17:52:10,670 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:52:10,670 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:52:10,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 17:52:10,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:10,871 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:52:10,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:52:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash 924161565, now seen corresponding path program 15 times [2023-12-02 17:52:10,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:52:10,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079025421] [2023-12-02 17:52:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:52:10,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:52:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 17:52:11,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:52:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079025421] [2023-12-02 17:52:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079025421] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:52:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519843346] [2023-12-02 17:52:11,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:52:11,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:11,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:52:11,595 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:52:11,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 17:52:11,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:52:11,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:52:11,904 WARN L260 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-02 17:52:11,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:52:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:52:14,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:52:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:52:15,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519843346] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:52:15,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211696808] [2023-12-02 17:52:15,906 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:52:15,906 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:52:15,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:52:15,907 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:52:15,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:52:16,003 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:52:16,315 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21940#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:52:16,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:52:16,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:52:16,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 16] total 55 [2023-12-02 17:52:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88211860] [2023-12-02 17:52:16,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:52:16,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-02 17:52:16,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:52:16,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-02 17:52:16,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=3123, Unknown=0, NotChecked=0, Total=3540 [2023-12-02 17:52:16,317 INFO L87 Difference]: Start difference. First operand 215 states and 266 transitions. Second operand has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:52:35,583 INFO L93 Difference]: Finished difference Result 364 states and 419 transitions. [2023-12-02 17:52:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-12-02 17:52:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 17:52:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:52:35,585 INFO L225 Difference]: With dead ends: 364 [2023-12-02 17:52:35,585 INFO L226 Difference]: Without dead ends: 321 [2023-12-02 17:52:35,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=963, Invalid=7779, Unknown=0, NotChecked=0, Total=8742 [2023-12-02 17:52:35,586 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 17:52:35,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 52 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 17:52:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-12-02 17:52:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 214. [2023-12-02 17:52:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.2347417840375587) internal successors, (263), 213 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:35,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 263 transitions. [2023-12-02 17:52:35,921 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 263 transitions. Word has length 31 [2023-12-02 17:52:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:52:35,921 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 263 transitions. [2023-12-02 17:52:35,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 55 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:35,921 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 263 transitions. [2023-12-02 17:52:35,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 17:52:35,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:52:35,922 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:52:35,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 17:52:36,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:36,122 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:52:36,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:52:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1355882535, now seen corresponding path program 14 times [2023-12-02 17:52:36,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:52:36,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826536419] [2023-12-02 17:52:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:52:36,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:52:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 17:52:36,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:52:36,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826536419] [2023-12-02 17:52:36,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826536419] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:52:36,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435538838] [2023-12-02 17:52:36,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:52:36,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:36,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:52:36,305 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:52:36,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 17:52:36,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 17:52:36,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:52:36,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 17:52:36,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:52:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 17:52:36,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:52:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 17:52:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435538838] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:52:37,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28193238] [2023-12-02 17:52:37,098 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:52:37,098 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:52:37,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:52:37,098 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:52:37,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:52:37,155 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:52:37,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23377#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:52:37,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:52:37,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:52:37,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 42 [2023-12-02 17:52:37,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161893887] [2023-12-02 17:52:37,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:52:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 17:52:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:52:37,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 17:52:37,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1811, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 17:52:37,323 INFO L87 Difference]: Start difference. First operand 214 states and 263 transitions. Second operand has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:52:48,029 INFO L93 Difference]: Finished difference Result 499 states and 566 transitions. [2023-12-02 17:52:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-12-02 17:52:48,030 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 17:52:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:52:48,032 INFO L225 Difference]: With dead ends: 499 [2023-12-02 17:52:48,033 INFO L226 Difference]: Without dead ends: 471 [2023-12-02 17:52:48,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1772, Invalid=7348, Unknown=0, NotChecked=0, Total=9120 [2023-12-02 17:52:48,034 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 377 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:52:48,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 142 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 17:52:48,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-12-02 17:52:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 236. [2023-12-02 17:52:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.2340425531914894) internal successors, (290), 235 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 290 transitions. [2023-12-02 17:52:48,483 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 290 transitions. Word has length 31 [2023-12-02 17:52:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:52:48,483 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 290 transitions. [2023-12-02 17:52:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 290 transitions. [2023-12-02 17:52:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 17:52:48,484 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:52:48,484 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:52:48,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 17:52:48,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 17:52:48,685 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:52:48,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:52:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash 145877085, now seen corresponding path program 15 times [2023-12-02 17:52:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:52:48,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448181266] [2023-12-02 17:52:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:52:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:52:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:52:49,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:52:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448181266] [2023-12-02 17:52:49,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448181266] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:52:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172458471] [2023-12-02 17:52:49,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:52:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:52:49,026 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:52:49,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 17:52:49,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:52:49,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:52:49,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 17:52:49,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:52:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:52:49,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:52:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:52:49,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172458471] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:52:49,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167925499] [2023-12-02 17:52:49,319 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:52:49,319 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:52:49,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:52:49,319 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:52:49,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:52:49,375 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:52:49,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25101#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:52:49,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:52:49,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:52:49,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 26 [2023-12-02 17:52:49,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627098582] [2023-12-02 17:52:49,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:52:49,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:52:49,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:52:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:52:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:52:49,536 INFO L87 Difference]: Start difference. First operand 236 states and 290 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:52:50,425 INFO L93 Difference]: Finished difference Result 283 states and 359 transitions. [2023-12-02 17:52:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:52:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-02 17:52:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:52:50,427 INFO L225 Difference]: With dead ends: 283 [2023-12-02 17:52:50,427 INFO L226 Difference]: Without dead ends: 280 [2023-12-02 17:52:50,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2023-12-02 17:52:50,428 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:52:50,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 77 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:52:50,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-12-02 17:52:50,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2023-12-02 17:52:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.2348484848484849) internal successors, (326), 264 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 326 transitions. [2023-12-02 17:52:50,885 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 326 transitions. Word has length 31 [2023-12-02 17:52:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:52:50,885 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 326 transitions. [2023-12-02 17:52:50,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:52:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 326 transitions. [2023-12-02 17:52:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:52:50,886 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:52:50,886 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:52:50,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-02 17:52:51,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-02 17:52:51,087 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:52:51,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:52:51,087 INFO L85 PathProgramCache]: Analyzing trace with hash 293952691, now seen corresponding path program 16 times [2023-12-02 17:52:51,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:52:51,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568039862] [2023-12-02 17:52:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:52:51,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:52:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:52:51,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:52:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568039862] [2023-12-02 17:52:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568039862] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:52:51,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752260873] [2023-12-02 17:52:51,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:52:51,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:52:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:52:51,296 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:52:51,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 17:52:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:52:51,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 17:52:51,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:52:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:52:51,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:52:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:52:52,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752260873] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:52:52,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73798489] [2023-12-02 17:52:52,087 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:52:52,087 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:52:52,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:52:52,088 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:52:52,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:52:52,144 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:52:52,325 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26424#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (<= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:52:52,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:52:52,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:52:52,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 20] total 47 [2023-12-02 17:52:52,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162101754] [2023-12-02 17:52:52,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:52:52,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-02 17:52:52,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:52:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-02 17:52:52,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2232, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 17:52:52,327 INFO L87 Difference]: Start difference. First operand 265 states and 326 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:53:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:53:13,521 INFO L93 Difference]: Finished difference Result 754 states and 847 transitions. [2023-12-02 17:53:13,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-12-02 17:53:13,521 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-02 17:53:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:53:13,525 INFO L225 Difference]: With dead ends: 754 [2023-12-02 17:53:13,525 INFO L226 Difference]: Without dead ends: 699 [2023-12-02 17:53:13,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5769 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=3510, Invalid=15950, Unknown=0, NotChecked=0, Total=19460 [2023-12-02 17:53:13,526 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 513 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:53:13,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 311 Invalid, 1861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 17:53:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-12-02 17:53:14,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 291. [2023-12-02 17:53:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.2206896551724138) internal successors, (354), 290 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:53:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 354 transitions. [2023-12-02 17:53:14,083 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 354 transitions. Word has length 32 [2023-12-02 17:53:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:53:14,083 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 354 transitions. [2023-12-02 17:53:14,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:53:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 354 transitions. [2023-12-02 17:53:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 17:53:14,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:53:14,084 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:53:14,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 17:53:14,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-02 17:53:14,285 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:53:14,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:53:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1154382461, now seen corresponding path program 16 times [2023-12-02 17:53:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:53:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788398245] [2023-12-02 17:53:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:53:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:53:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:53:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:53:14,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:53:14,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788398245] [2023-12-02 17:53:14,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788398245] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:53:14,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344590464] [2023-12-02 17:53:14,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:53:14,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:53:14,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:53:14,533 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:53:14,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89722f32-4fc5-4601-b2ac-ddc81aad6c49/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 17:53:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:53:14,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 17:53:14,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:53:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:53:14,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:53:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 17:53:15,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344590464] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:53:15,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251932206] [2023-12-02 17:53:15,210 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-12-02 17:53:15,210 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:53:15,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:53:15,210 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:53:15,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:53:15,284 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 17:53:15,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28834#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) 0) (not (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-12-02 17:53:15,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 17:53:15,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:53:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2023-12-02 17:53:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851879288] [2023-12-02 17:53:15,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:53:15,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-02 17:53:15,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:53:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-02 17:53:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1812, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 17:53:15,453 INFO L87 Difference]: Start difference. First operand 291 states and 354 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:53:34,213 WARN L293 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:54:27,812 WARN L293 SmtUtils]: Spent 32.35s on a formula simplification. DAG size of input: 77 DAG size of output: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:54:45,091 WARN L293 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:55:30,471 WARN L293 SmtUtils]: Spent 23.77s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:56:05,998 WARN L293 SmtUtils]: Spent 22.96s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:56:21,816 WARN L293 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:56:56,381 WARN L293 SmtUtils]: Spent 15.25s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:57:22,895 WARN L293 SmtUtils]: Spent 15.92s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:57:52,290 WARN L293 SmtUtils]: Spent 14.89s on a formula simplification. DAG size of input: 69 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:58:31,654 WARN L293 SmtUtils]: Spent 15.22s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:58:57,968 WARN L293 SmtUtils]: Spent 15.79s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:59:25,254 WARN L293 SmtUtils]: Spent 13.88s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 17:59:46,172 WARN L293 SmtUtils]: Spent 10.74s on a formula simplification. DAG size of input: 65 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:00:19,918 WARN L293 SmtUtils]: Spent 12.39s on a formula simplification. DAG size of input: 65 DAG size of output: 64 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:00:45,688 WARN L293 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:01:06,583 WARN L293 SmtUtils]: Spent 10.79s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:01:25,746 WARN L293 SmtUtils]: Spent 10.55s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 18:01:27,773 WARN L854 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296))) is different from false