./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:03:18,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:18,816 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:03:18,820 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:18,821 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:18,865 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:18,865 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:18,866 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:18,867 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:18,868 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:18,868 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:18,869 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:18,870 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:18,870 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:18,871 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:18,871 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:18,872 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:18,872 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:18,873 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:18,874 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:18,874 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:18,879 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:18,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:18,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:18,881 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:03:18,882 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:18,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:03:18,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:18,883 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:18,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:18,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:18,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:03:18,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:18,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:18,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:18,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:18,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:18,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:18,888 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:18,888 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:18,889 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:18,895 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:18,895 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:18,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:18,896 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:18,896 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:18,896 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:18,896 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_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f54012f988f8b18e3a56958a20c5d2f68df7899121416cbc3449d3f0665a6c5 [2023-11-25 00:03:19,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:19,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:19,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:19,188 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:19,188 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:19,190 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2023-11-25 00:03:22,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:03:22,466 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:03:22,467 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2023-11-25 00:03:22,475 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/data/815ed2220/20570891d98247119f98c25369d24ba1/FLAG6d1f29e50 [2023-11-25 00:03:22,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/data/815ed2220/20570891d98247119f98c25369d24ba1 [2023-11-25 00:03:22,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:03:22,496 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:03:22,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:22,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:03:22,504 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:03:22,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1250779e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22, skipping insertion in model container [2023-11-25 00:03:22,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,529 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:03:22,716 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c[331,344] [2023-11-25 00:03:22,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:22,758 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:03:22,772 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c[331,344] [2023-11-25 00:03:22,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:22,812 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:03:22,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22 WrapperNode [2023-11-25 00:03:22,813 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:22,814 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:22,814 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:03:22,814 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:03:22,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,877 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-11-25 00:03:22,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:22,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:03:22,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:03:22,879 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:03:22,889 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,909 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:03:22,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:03:22,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:03:22,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:03:22,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (1/1) ... [2023-11-25 00:03:22,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:22,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:22,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:03:22,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:03:23,009 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:03:23,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:03:23,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:03:23,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:03:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:03:23,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:03:23,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:03:23,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:03:23,128 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:03:23,131 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:03:23,424 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:03:23,553 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:03:23,553 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-25 00:03:23,555 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:23 BoogieIcfgContainer [2023-11-25 00:03:23,555 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:03:23,558 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:03:23,558 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:03:23,562 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:03:23,562 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:03:22" (1/3) ... [2023-11-25 00:03:23,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7bb147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:23, skipping insertion in model container [2023-11-25 00:03:23,563 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:22" (2/3) ... [2023-11-25 00:03:23,563 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7bb147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:23, skipping insertion in model container [2023-11-25 00:03:23,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:23" (3/3) ... [2023-11-25 00:03:23,565 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2023-11-25 00:03:23,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:03:23,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:03:23,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:03:23,637 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@42eec9f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:03:23,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:03:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-25 00:03:23,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:23,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-25 00:03:23,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:23,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash 113225757, now seen corresponding path program 1 times [2023-11-25 00:03:23,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:23,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170473255] [2023-11-25 00:03:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:23,740 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:23,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223240618] [2023-11-25 00:03:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:23,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:23,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:23,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:03:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:23,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:03:23,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:23,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:23,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170473255] [2023-11-25 00:03:23,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:23,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223240618] [2023-11-25 00:03:23,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223240618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:23,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:23,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:03:23,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109347975] [2023-11-25 00:03:23,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:23,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:03:23,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:03:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:03:23,952 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:24,005 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-11-25 00:03:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:03:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-25 00:03:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:24,015 INFO L225 Difference]: With dead ends: 15 [2023-11-25 00:03:24,016 INFO L226 Difference]: Without dead ends: 8 [2023-11-25 00:03:24,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:03:24,023 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:24,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:03:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-25 00:03:24,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-25 00:03:24,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:24,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-11-25 00:03:24,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-11-25 00:03:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:24,066 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-11-25 00:03:24,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:24,068 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-11-25 00:03:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:03:24,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:24,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-25 00:03:24,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:24,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:03:24,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:24,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash -777643133, now seen corresponding path program 1 times [2023-11-25 00:03:24,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:24,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950407706] [2023-11-25 00:03:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:24,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:24,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561613389] [2023-11-25 00:03:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:24,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:24,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:24,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:03:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:24,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:03:24,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:24,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:03:24,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:24,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950407706] [2023-11-25 00:03:24,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:24,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561613389] [2023-11-25 00:03:24,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561613389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:24,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950357793] [2023-11-25 00:03:24,519 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-25 00:03:24,520 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:24,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:03:24,531 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:03:24,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:03:25,033 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:03:25,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '92#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (mod (div (mod ~N~0 4294967296) (mod |ULTIMATE.start_main_~R~0#1| 4294967296)) 4294967296) (mod |ULTIMATE.start_main_~j~0#1| 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-25 00:03:25,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:03:25,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:03:25,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-25 00:03:25,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025890118] [2023-11-25 00:03:25,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:25,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:25,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:25,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:03:25,125 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:25,166 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-11-25 00:03:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-25 00:03:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:25,167 INFO L225 Difference]: With dead ends: 16 [2023-11-25 00:03:25,167 INFO L226 Difference]: Without dead ends: 11 [2023-11-25 00:03:25,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:03:25,169 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:25,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:03:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-25 00:03:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-25 00:03:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-25 00:03:25,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-11-25 00:03:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:25,179 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-25 00:03:25,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-25 00:03:25,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-25 00:03:25,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:25,185 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-25 00:03:25,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:25,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:25,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1028499043, now seen corresponding path program 2 times [2023-11-25 00:03:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:25,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247512566] [2023-11-25 00:03:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:25,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:25,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:25,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237750033] [2023-11-25 00:03:25,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:03:25,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:25,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:25,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:25,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:03:25,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-25 00:03:25,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:25,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:03:25,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:25,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-25 00:03:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:03:25,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:25,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247512566] [2023-11-25 00:03:25,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237750033] [2023-11-25 00:03:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237750033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:25,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:25,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:03:25,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33680159] [2023-11-25 00:03:25,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:25,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:03:25,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:25,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:03:25,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:03:25,741 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:25,782 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2023-11-25 00:03:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:03:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-25 00:03:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:25,784 INFO L225 Difference]: With dead ends: 16 [2023-11-25 00:03:25,784 INFO L226 Difference]: Without dead ends: 14 [2023-11-25 00:03:25,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:03:25,792 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:25,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:03:25,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-25 00:03:25,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-25 00:03:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:25,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-25 00:03:25,804 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-25 00:03:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:25,804 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-25 00:03:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-25 00:03:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-25 00:03:25,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:25,806 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:25,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:26,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:26,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:26,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash 286933033, now seen corresponding path program 1 times [2023-11-25 00:03:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:26,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422339762] [2023-11-25 00:03:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:26,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:26,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:26,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664928387] [2023-11-25 00:03:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:26,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:26,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:26,039 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:26,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:03:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:26,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:03:26,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:03:26,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:03:26,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422339762] [2023-11-25 00:03:26,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664928387] [2023-11-25 00:03:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664928387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:26,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194359799] [2023-11-25 00:03:26,313 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:03:26,313 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:26,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:03:26,314 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:03:26,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:03:26,586 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:03:26,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '284#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-25 00:03:26,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:03:26,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:03:26,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-25 00:03:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648896423] [2023-11-25 00:03:26,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:26,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:03:26,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:03:26,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:03:26,691 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:26,755 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-11-25 00:03:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:03:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-25 00:03:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:26,756 INFO L225 Difference]: With dead ends: 26 [2023-11-25 00:03:26,756 INFO L226 Difference]: Without dead ends: 19 [2023-11-25 00:03:26,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:03:26,762 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:26,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:03:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-25 00:03:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-25 00:03:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-25 00:03:26,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2023-11-25 00:03:26,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:26,781 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-25 00:03:26,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-25 00:03:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-25 00:03:26,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:26,783 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:26,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-25 00:03:26,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:26,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:26,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1076953577, now seen corresponding path program 2 times [2023-11-25 00:03:26,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:26,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535280657] [2023-11-25 00:03:26,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:26,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:27,027 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:27,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313379077] [2023-11-25 00:03:27,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:03:27,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:27,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:27,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:27,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:03:27,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:03:27,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:27,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-25 00:03:27,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:27,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:03:27,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 62 [2023-11-25 00:03:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-25 00:03:27,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:28,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:03:28,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 96 [2023-11-25 00:03:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-25 00:03:28,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535280657] [2023-11-25 00:03:28,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:28,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313379077] [2023-11-25 00:03:28,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313379077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:28,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053033173] [2023-11-25 00:03:28,912 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:03:28,912 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:28,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:03:28,913 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:03:28,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:03:29,153 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:03:29,304 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-25 00:03:29,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:03:29,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:03:29,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-25 00:03:29,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253217100] [2023-11-25 00:03:29,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:29,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-25 00:03:29,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:29,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-25 00:03:29,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:03:29,308 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:31,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-25 00:03:32,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-25 00:03:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:33,459 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-11-25 00:03:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-25 00:03:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-25 00:03:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:33,462 INFO L225 Difference]: With dead ends: 31 [2023-11-25 00:03:33,462 INFO L226 Difference]: Without dead ends: 29 [2023-11-25 00:03:33,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:03:33,463 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:33,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 3.6s Time] [2023-11-25 00:03:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-25 00:03:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-25 00:03:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-25 00:03:33,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 18 [2023-11-25 00:03:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:33,477 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-25 00:03:33,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-25 00:03:33,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-25 00:03:33,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:33,479 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 4, 1, 1, 1, 1] [2023-11-25 00:03:33,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:33,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:33,686 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:33,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:33,686 INFO L85 PathProgramCache]: Analyzing trace with hash 850917597, now seen corresponding path program 3 times [2023-11-25 00:03:33,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:33,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963537803] [2023-11-25 00:03:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:33,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:33,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:33,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930856972] [2023-11-25 00:03:33,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:03:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:33,729 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:33,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:03:33,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:03:33,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:33,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:03:33,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-25 00:03:34,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-25 00:03:34,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963537803] [2023-11-25 00:03:34,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930856972] [2023-11-25 00:03:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930856972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1435646656] [2023-11-25 00:03:34,342 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:03:34,342 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:34,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:03:34,343 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:03:34,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:03:34,569 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:03:34,704 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '754#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-25 00:03:34,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:03:34,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:03:34,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-25 00:03:34,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123554949] [2023-11-25 00:03:34,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:34,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-25 00:03:34,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:34,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-25 00:03:34,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:03:34,706 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:34,806 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-11-25 00:03:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-25 00:03:34,807 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-25 00:03:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:34,808 INFO L225 Difference]: With dead ends: 56 [2023-11-25 00:03:34,810 INFO L226 Difference]: Without dead ends: 40 [2023-11-25 00:03:34,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2023-11-25 00:03:34,812 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:34,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 18 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-25 00:03:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-25 00:03:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-25 00:03:34,835 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 27 [2023-11-25 00:03:34,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:34,835 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-25 00:03:34,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-25 00:03:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-25 00:03:34,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:34,837 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 4, 1, 1, 1, 1] [2023-11-25 00:03:34,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:35,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:35,045 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:35,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1261786461, now seen corresponding path program 4 times [2023-11-25 00:03:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:35,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299561461] [2023-11-25 00:03:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:35,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:35,078 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:35,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974243134] [2023-11-25 00:03:35,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:03:35,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:35,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:35,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:35,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-25 00:03:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:35,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-25 00:03:35,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-25 00:03:35,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-25 00:03:36,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299561461] [2023-11-25 00:03:36,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974243134] [2023-11-25 00:03:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974243134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:03:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759284700] [2023-11-25 00:03:36,894 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:03:36,895 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:03:36,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:03:36,895 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:03:36,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:03:37,111 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:03:37,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (<= 1 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-25 00:03:37,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:03:37,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-25 00:03:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2023-11-25 00:03:37,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976559002] [2023-11-25 00:03:37,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-25 00:03:37,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-25 00:03:37,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-25 00:03:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1141, Invalid=1511, Unknown=0, NotChecked=0, Total=2652 [2023-11-25 00:03:37,259 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:37,420 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2023-11-25 00:03:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-25 00:03:37,421 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-25 00:03:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:37,422 INFO L225 Difference]: With dead ends: 80 [2023-11-25 00:03:37,423 INFO L226 Difference]: Without dead ends: 64 [2023-11-25 00:03:37,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1141, Invalid=1511, Unknown=0, NotChecked=0, Total=2652 [2023-11-25 00:03:37,425 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:37,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:03:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-25 00:03:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-25 00:03:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-11-25 00:03:37,443 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 39 [2023-11-25 00:03:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:37,444 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-11-25 00:03:37,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:03:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-11-25 00:03:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-25 00:03:37,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:37,446 INFO L195 NwaCegarLoop]: trace histogram [46, 5, 4, 4, 1, 1, 1, 1] [2023-11-25 00:03:37,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:37,654 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:37,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 224120413, now seen corresponding path program 5 times [2023-11-25 00:03:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:37,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855425317] [2023-11-25 00:03:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:37,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:37,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:37,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886235041] [2023-11-25 00:03:37,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:03:37,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:37,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:37,719 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:37,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72ca11d9-be1d-4ac2-8b3e-61de121cafae/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-25 00:03:38,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-25 00:03:38,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:03:38,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-25 00:03:38,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:40,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:03:40,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 187 treesize of output 395 [2023-11-25 00:03:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-11-25 00:03:40,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:03:44,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:03:44,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 465 treesize of output 617