./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje --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 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:58:08,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:58:08,673 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:58:08,680 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:58:08,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:58:08,716 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:58:08,718 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:58:08,719 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:58:08,720 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:58:08,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:58:08,721 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:58:08,722 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:58:08,723 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:58:08,723 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:58:08,725 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:58:08,726 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:58:08,726 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:58:08,726 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:58:08,727 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:58:08,727 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:58:08,727 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:58:08,732 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:58:08,733 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:58:08,734 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:58:08,734 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:58:08,735 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:58:08,735 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:58:08,735 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:58:08,736 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:58:08,736 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:58:08,736 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:58:08,736 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:58:08,737 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:58:08,737 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:58:08,737 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:58:08,737 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:58:08,738 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:58:08,738 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:58:08,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:58:08,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:58:08,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:58:08,739 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:58:08,739 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:58:08,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:58:08,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:58:08,740 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:58:08,740 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:58:08,740 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_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 [2024-11-09 05:58:08,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:58:09,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:58:09,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:58:09,038 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:58:09,038 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:58:09,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c Unable to find full path for "g++" [2024-11-09 05:58:11,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:58:11,283 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:58:11,284 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2024-11-09 05:58:11,289 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/data/7efc195e3/8114e038446a4eea9536a43465e866de/FLAG8e8ca4b4b [2024-11-09 05:58:11,307 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/data/7efc195e3/8114e038446a4eea9536a43465e866de [2024-11-09 05:58:11,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:58:11,311 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:58:11,313 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:58:11,313 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:58:11,319 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:58:11,320 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e593d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11, skipping insertion in model container [2024-11-09 05:58:11,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,340 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:58:11,523 WARN L250 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_e36adf6d-7135-4648-a88d-43465a4c2a7c/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c[319,332] [2024-11-09 05:58:11,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:58:11,549 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:58:11,563 WARN L250 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_e36adf6d-7135-4648-a88d-43465a4c2a7c/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c[319,332] [2024-11-09 05:58:11,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:58:11,584 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:58:11,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11 WrapperNode [2024-11-09 05:58:11,585 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:58:11,586 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:58:11,586 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:58:11,586 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:58:11,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,617 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2024-11-09 05:58:11,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:58:11,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:58:11,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:58:11,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:58:11,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,628 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,633 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,638 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,643 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:58:11,646 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:58:11,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:58:11,650 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:58:11,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (1/1) ... [2024-11-09 05:58:11,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:58:11,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:11,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:58:11,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:58:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:58:11,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:58:11,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:58:11,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:58:11,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 05:58:11,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 05:58:11,806 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:58:11,809 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:58:11,980 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 05:58:11,980 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:58:12,019 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:58:12,020 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 05:58:12,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:58:12 BoogieIcfgContainer [2024-11-09 05:58:12,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:58:12,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:58:12,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:58:12,027 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:58:12,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:58:11" (1/3) ... [2024-11-09 05:58:12,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470fdd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:58:12, skipping insertion in model container [2024-11-09 05:58:12,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:58:11" (2/3) ... [2024-11-09 05:58:12,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470fdd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:58:12, skipping insertion in model container [2024-11-09 05:58:12,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:58:12" (3/3) ... [2024-11-09 05:58:12,033 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2024-11-09 05:58:12,052 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:58:12,052 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:58:12,107 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:58:12,113 INFO L333 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, 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;@52c12dc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:58:12,114 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:58:12,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 05:58:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 05:58:12,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:12,127 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:12,128 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:12,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:12,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1298441353, now seen corresponding path program 1 times [2024-11-09 05:58:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:12,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732698769] [2024-11-09 05:58:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:12,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:12,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732698769] [2024-11-09 05:58:12,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732698769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:12,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:58:12,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:58:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144237013] [2024-11-09 05:58:12,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:12,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:58:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:58:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:58:12,434 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:12,499 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2024-11-09 05:58:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:58:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 05:58:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:12,511 INFO L225 Difference]: With dead ends: 29 [2024-11-09 05:58:12,511 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 05:58:12,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:58:12,521 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:12,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 05:58:12,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 05:58:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 05:58:12,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2024-11-09 05:58:12,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 7 [2024-11-09 05:58:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:12,566 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2024-11-09 05:58:12,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:12,568 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2024-11-09 05:58:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 05:58:12,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:12,569 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:12,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:58:12,570 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:12,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1821587222, now seen corresponding path program 1 times [2024-11-09 05:58:12,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:12,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224487596] [2024-11-09 05:58:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:12,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:12,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:12,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224487596] [2024-11-09 05:58:12,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224487596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:12,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535319832] [2024-11-09 05:58:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:12,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:12,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:12,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:12,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:58:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:12,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:58:12,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:12,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:13,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535319832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:13,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731586497] [2024-11-09 05:58:13,156 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-09 05:58:13,158 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:13,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:13,170 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:13,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:13,633 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2024-11-09 05:58:13,697 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:14,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1731586497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:58:14,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:14,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2024-11-09 05:58:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169652141] [2024-11-09 05:58:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:58:14,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:58:14,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:58:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:58:14,240 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:14,407 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-11-09 05:58:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:58:14,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 05:58:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:14,408 INFO L225 Difference]: With dead ends: 25 [2024-11-09 05:58:14,408 INFO L226 Difference]: Without dead ends: 17 [2024-11-09 05:58:14,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-09 05:58:14,410 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:14,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-09 05:58:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-09 05:58:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2024-11-09 05:58:14,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2024-11-09 05:58:14,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:14,418 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2024-11-09 05:58:14,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:14,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2024-11-09 05:58:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 05:58:14,419 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:14,419 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:14,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:58:14,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:14,624 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:14,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -724587547, now seen corresponding path program 1 times [2024-11-09 05:58:14,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:14,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656368189] [2024-11-09 05:58:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:14,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:58:14,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:14,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656368189] [2024-11-09 05:58:14,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656368189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:14,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762662636] [2024-11-09 05:58:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:14,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:14,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:14,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:58:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:14,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 05:58:14,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:14,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:14,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762662636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:14,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065272312] [2024-11-09 05:58:14,993 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:58:14,993 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:14,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:14,994 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:14,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:15,382 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2024-11-09 05:58:15,501 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:16,369 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '278#(and (exists ((|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~y~0#1_41| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_41| 1)) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~y~0#1_41| 0) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_2|) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_2| 2) 0)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:16,370 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:16,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:16,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-09 05:58:16,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366113217] [2024-11-09 05:58:16,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:16,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 05:58:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:16,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 05:58:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:58:16,373 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:16,480 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2024-11-09 05:58:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 05:58:16,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 05:58:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:16,482 INFO L225 Difference]: With dead ends: 36 [2024-11-09 05:58:16,482 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 05:58:16,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:58:16,484 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:16,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 05:58:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 05:58:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 05:58:16,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2024-11-09 05:58:16,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:16,501 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 05:58:16,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 05:58:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 05:58:16,502 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:16,502 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:16,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:58:16,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:16,703 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:16,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash -397435383, now seen corresponding path program 2 times [2024-11-09 05:58:16,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:16,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186610063] [2024-11-09 05:58:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:16,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:16,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:16,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186610063] [2024-11-09 05:58:16,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186610063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:16,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452580304] [2024-11-09 05:58:16,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:58:16,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:16,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:16,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:16,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:58:17,049 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 05:58:17,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:17,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 05:58:17,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:58:17,096 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 05:58:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452580304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359511656] [2024-11-09 05:58:17,215 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:58:17,216 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:17,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:17,217 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:17,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:17,561 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 67 for LOIs [2024-11-09 05:58:17,650 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:18,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '503#(and (exists ((|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_58| Int)) (and (<= 1 |#StackHeapBarrier|) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_3| 2) 0)) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_3|) (<= |v_ULTIMATE.start_main_~y~0#1_58| 0) (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_58| 1)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:18,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:18,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:18,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 14 [2024-11-09 05:58:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193104759] [2024-11-09 05:58:18,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:18,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 05:58:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 05:58:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-11-09 05:58:18,545 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:18,707 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2024-11-09 05:58:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:58:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 05:58:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:18,709 INFO L225 Difference]: With dead ends: 51 [2024-11-09 05:58:18,709 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 05:58:18,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-11-09 05:58:18,711 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:18,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 61 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 05:58:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-11-09 05:58:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-09 05:58:18,721 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2024-11-09 05:58:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:18,721 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-09 05:58:18,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-09 05:58:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 05:58:18,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:18,723 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:18,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:58:18,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:18,924 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:18,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1226871184, now seen corresponding path program 3 times [2024-11-09 05:58:18,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:18,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031902710] [2024-11-09 05:58:18,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:18,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:18,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:19,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:19,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031902710] [2024-11-09 05:58:19,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031902710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:19,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138262905] [2024-11-09 05:58:19,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:58:19,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:19,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:19,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:58:19,506 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:58:19,507 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:19,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 05:58:19,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:19,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:20,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138262905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20548021] [2024-11-09 05:58:20,826 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:58:20,826 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:20,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:20,826 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:20,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:21,079 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2024-11-09 05:58:21,157 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:21,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '841#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~y~0#1_90| Int)) (and (<= 1 |#StackHeapBarrier|) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_4| 2) 0)) (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_90| 1)) (<= |v_ULTIMATE.start_main_~y~0#1_90| 0) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_4|))))' at error location [2024-11-09 05:58:21,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:21,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:21,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-09 05:58:21,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611311901] [2024-11-09 05:58:21,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:21,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 05:58:21,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:21,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 05:58:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 05:58:21,976 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:22,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:22,082 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-11-09 05:58:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 05:58:22,082 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-11-09 05:58:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:22,083 INFO L225 Difference]: With dead ends: 56 [2024-11-09 05:58:22,083 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 05:58:22,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 05:58:22,085 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:22,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 05:58:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-11-09 05:58:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:22,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-11-09 05:58:22,097 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 29 [2024-11-09 05:58:22,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:22,098 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-11-09 05:58:22,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-11-09 05:58:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 05:58:22,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:22,100 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:22,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:22,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:22,301 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:22,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1671393837, now seen corresponding path program 4 times [2024-11-09 05:58:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:22,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566615945] [2024-11-09 05:58:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:22,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:23,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566615945] [2024-11-09 05:58:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566615945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92664238] [2024-11-09 05:58:23,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:58:23,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:23,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:23,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:23,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:58:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:23,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:58:23,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:23,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:24,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92664238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:24,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528878387] [2024-11-09 05:58:24,715 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:58:24,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:24,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:24,716 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:24,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:24,974 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2024-11-09 05:58:25,054 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:25,890 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1297#(and (exists ((|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~y~0#1_136| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_136| 1)) (<= |v_ULTIMATE.start_main_~y~0#1_136| 0) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_5|) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_5| 2) 0)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:25,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:25,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2024-11-09 05:58:25,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475623672] [2024-11-09 05:58:25,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:25,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 05:58:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:25,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 05:58:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=1517, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 05:58:25,894 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:26,060 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2024-11-09 05:58:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 05:58:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-09 05:58:26,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:26,062 INFO L225 Difference]: With dead ends: 84 [2024-11-09 05:58:26,063 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 05:58:26,064 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=835, Invalid=1517, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 05:58:26,065 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:26,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:58:26,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 05:58:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2024-11-09 05:58:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2024-11-09 05:58:26,077 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 43 [2024-11-09 05:58:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:26,078 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2024-11-09 05:58:26,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2024-11-09 05:58:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 05:58:26,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:26,080 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:26,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:58:26,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:26,284 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:26,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:26,284 INFO L85 PathProgramCache]: Analyzing trace with hash 831815463, now seen corresponding path program 5 times [2024-11-09 05:58:26,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:26,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556762100] [2024-11-09 05:58:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:26,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 711 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:58:27,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556762100] [2024-11-09 05:58:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556762100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983670094] [2024-11-09 05:58:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:58:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:27,664 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:27,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:58:27,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 05:58:27,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:27,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 05:58:27,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:58:27,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 05:58:28,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983670094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:28,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2106454366] [2024-11-09 05:58:28,269 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:58:28,269 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:28,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:28,270 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:28,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:28,449 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 67 for LOIs [2024-11-09 05:58:28,515 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:29,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2012#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~y~0#1_183| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_6| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_6|) (<= |v_ULTIMATE.start_main_~y~0#1_183| 0) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_6| 2) 0)) (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_183| 1)))))' at error location [2024-11-09 05:58:29,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:29,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 8, 8] total 47 [2024-11-09 05:58:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214553946] [2024-11-09 05:58:29,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:29,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 05:58:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 05:58:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=760, Invalid=2320, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 05:58:29,593 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:30,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:30,008 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2024-11-09 05:58:30,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 05:58:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2024-11-09 05:58:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:30,012 INFO L225 Difference]: With dead ends: 155 [2024-11-09 05:58:30,012 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 05:58:30,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1147, Invalid=3013, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 05:58:30,017 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:30,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 85 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:58:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 05:58:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2024-11-09 05:58:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:30,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2024-11-09 05:58:30,045 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 71 [2024-11-09 05:58:30,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:30,046 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2024-11-09 05:58:30,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2024-11-09 05:58:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-09 05:58:30,051 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:30,052 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:30,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 05:58:30,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:30,253 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:30,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash -330246278, now seen corresponding path program 6 times [2024-11-09 05:58:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:30,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131816324] [2024-11-09 05:58:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:32,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:32,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131816324] [2024-11-09 05:58:32,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131816324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:32,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179449148] [2024-11-09 05:58:32,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:58:32,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:32,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:32,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:32,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:58:33,030 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:58:33,030 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:58:33,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 05:58:33,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-11-09 05:58:33,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:58:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-11-09 05:58:34,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179449148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:58:34,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488682505] [2024-11-09 05:58:34,558 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:58:34,558 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:58:34,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:58:34,559 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:58:34,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:58:34,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2024-11-09 05:58:34,760 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:58:36,009 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3013#(and (exists ((|v_ULTIMATE.start_main_~y~0#1_247| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_7| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_7|) (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_247| 1)) (<= |v_ULTIMATE.start_main_~y~0#1_247| 0) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_7| 2) 0)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:58:36,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:58:36,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:58:36,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 16, 16] total 73 [2024-11-09 05:58:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752298550] [2024-11-09 05:58:36,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:58:36,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-09 05:58:36,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:58:36,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-09 05:58:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1790, Invalid=4852, Unknown=0, NotChecked=0, Total=6642 [2024-11-09 05:58:36,014 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:58:36,865 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2024-11-09 05:58:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-09 05:58:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-11-09 05:58:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:58:36,868 INFO L225 Difference]: With dead ends: 191 [2024-11-09 05:58:36,868 INFO L226 Difference]: Without dead ends: 128 [2024-11-09 05:58:36,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2750, Invalid=6756, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 05:58:36,871 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:58:36,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 68 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:58:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-09 05:58:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2024-11-09 05:58:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 123 states have (on average 1.024390243902439) internal successors, (126), 124 states have internal predecessors, (126), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:58:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2024-11-09 05:58:36,898 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 89 [2024-11-09 05:58:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:58:36,898 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2024-11-09 05:58:36,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 73 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:58:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2024-11-09 05:58:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 05:58:36,900 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:58:36,901 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:58:36,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:58:37,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:37,105 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:58:37,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:58:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 314203045, now seen corresponding path program 7 times [2024-11-09 05:58:37,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:58:37,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381409919] [2024-11-09 05:58:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:58:37,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:58:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:43,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:58:43,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381409919] [2024-11-09 05:58:43,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381409919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:58:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386479631] [2024-11-09 05:58:43,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:58:43,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:58:43,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:58:43,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:58:43,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:58:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:58:43,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 05:58:43,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:58:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:58:43,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:59:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 900 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:59:54,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386479631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:59:54,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1067473831] [2024-11-09 05:59:54,341 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 05:59:54,341 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:59:54,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:59:54,342 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:59:54,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:59:54,482 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2024-11-09 05:59:54,522 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:59:55,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4384#(and (exists ((|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~y~0#1_373| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~y~0#1_373| 0) (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_373| 1)) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_8| 2) 0)) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_8|))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 05:59:55,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:59:55,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:59:55,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 120 [2024-11-09 05:59:55,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535106405] [2024-11-09 05:59:55,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:59:55,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-09 05:59:55,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:59:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-09 05:59:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7071, Invalid=9441, Unknown=0, NotChecked=0, Total=16512 [2024-11-09 05:59:55,658 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 121 states, 121 states have (on average 2.0165289256198347) internal successors, (244), 120 states have internal predecessors, (244), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:59:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:59:56,220 INFO L93 Difference]: Finished difference Result 196 states and 228 transitions. [2024-11-09 05:59:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-09 05:59:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0165289256198347) internal successors, (244), 120 states have internal predecessors, (244), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2024-11-09 05:59:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:59:56,223 INFO L225 Difference]: With dead ends: 196 [2024-11-09 05:59:56,224 INFO L226 Difference]: Without dead ends: 188 [2024-11-09 05:59:56,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2288 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=7071, Invalid=9441, Unknown=0, NotChecked=0, Total=16512 [2024-11-09 05:59:56,229 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:59:56,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:59:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-09 05:59:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2024-11-09 05:59:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 183 states have (on average 1.0163934426229508) internal successors, (186), 184 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 05:59:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2024-11-09 05:59:56,257 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 123 [2024-11-09 05:59:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:59:56,258 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2024-11-09 05:59:56,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0165289256198347) internal successors, (244), 120 states have internal predecessors, (244), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:59:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2024-11-09 05:59:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-09 05:59:56,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:59:56,261 INFO L215 NwaCegarLoop]: trace histogram [58, 58, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:59:56,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:59:56,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:59:56,462 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:59:56,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:59:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash 830690895, now seen corresponding path program 8 times [2024-11-09 05:59:56,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:59:56,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734452436] [2024-11-09 05:59:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:59:56,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:59:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 4260 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:00:05,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734452436] [2024-11-09 06:00:05,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734452436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846514715] [2024-11-09 06:00:05,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:00:05,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:05,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:05,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:05,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:00:06,173 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2024-11-09 06:00:06,174 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:06,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 06:00:06,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2024-11-09 06:00:08,061 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 3364 trivial. 0 not checked. [2024-11-09 06:00:11,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846514715] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:11,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629637772] [2024-11-09 06:00:11,634 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-09 06:00:11,634 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:11,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:00:11,634 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:00:11,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:00:11,787 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 67 for LOIs [2024-11-09 06:00:11,830 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:00:13,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6210#(and (exists ((|v_ULTIMATE.start_main_~y~0#1_500| Int) (|v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_9| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_9|) (not (= (mod |v_ULTIMATE.start_main_~z~0#1_BEFORE_CALL_9| 2) 0)) (<= 0 (+ |v_ULTIMATE.start_main_~y~0#1_500| 1)) (<= |v_ULTIMATE.start_main_~y~0#1_500| 0))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 06:00:13,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:00:13,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:00:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 32, 32] total 150 [2024-11-09 06:00:13,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915718823] [2024-11-09 06:00:13,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:00:13,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2024-11-09 06:00:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2024-11-09 06:00:13,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7309, Invalid=17813, Unknown=0, NotChecked=0, Total=25122 [2024-11-09 06:00:13,598 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 151 states, 151 states have (on average 2.033112582781457) internal successors, (307), 150 states have internal predecessors, (307), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:00:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:16,661 INFO L93 Difference]: Finished difference Result 379 states and 415 transitions. [2024-11-09 06:00:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-11-09 06:00:16,662 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.033112582781457) internal successors, (307), 150 states have internal predecessors, (307), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2024-11-09 06:00:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:16,664 INFO L225 Difference]: With dead ends: 379 [2024-11-09 06:00:16,664 INFO L226 Difference]: Without dead ends: 254 [2024-11-09 06:00:16,670 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 478 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6436 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=11491, Invalid=25565, Unknown=0, NotChecked=0, Total=37056 [2024-11-09 06:00:16,671 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:16,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:00:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-09 06:00:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2024-11-09 06:00:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.0120481927710843) internal successors, (252), 250 states have internal predecessors, (252), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:00:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2024-11-09 06:00:16,709 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 183 [2024-11-09 06:00:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:16,709 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2024-11-09 06:00:16,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.033112582781457) internal successors, (307), 150 states have internal predecessors, (307), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:00:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2024-11-09 06:00:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2024-11-09 06:00:16,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:16,713 INFO L215 NwaCegarLoop]: trace histogram [62, 62, 59, 59, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:00:16,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:00:16,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:00:16,918 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:16,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash -891136406, now seen corresponding path program 9 times [2024-11-09 06:00:16,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:16,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83645085] [2024-11-09 06:00:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:16,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7325 backedges. 0 proven. 7325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:39,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83645085] [2024-11-09 06:00:39,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83645085] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127364209] [2024-11-09 06:00:39,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:00:39,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:39,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:39,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:39,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e36adf6d-7135-4648-a88d-43465a4c2a7c/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:00:39,328 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:00:39,328 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:00:39,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-09 06:00:39,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7325 backedges. 0 proven. 7325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:39,936 INFO L311 TraceCheckSpWp]: Computing backward predicates...