./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3.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_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/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_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/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_d872e777-c125-4ac0-86e9-24b5b606796d/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 c10f08fb4b6a5b6f03e91e10a510f262e1b7fa98e124f4a160c252b3d63b04c2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:25,876 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:26,007 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:06:26,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:26,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:26,071 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:26,072 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:26,073 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:26,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:26,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:26,081 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:26,082 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:26,083 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:26,085 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:26,086 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:26,086 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:26,087 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:26,087 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:26,088 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:26,088 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:26,089 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:26,090 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:26,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:26,116 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:06:26,117 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:06:26,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:26,118 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:06:26,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:26,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:06:26,120 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:26,121 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:06:26,122 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:06:26,122 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:06:26,122 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:26,123 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:26,123 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:26,124 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:26,124 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:26,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:26,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:26,125 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:06:26,125 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:26,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:26,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:26,127 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:06:26,127 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:26,127 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:26,128 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_d872e777-c125-4ac0-86e9-24b5b606796d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c10f08fb4b6a5b6f03e91e10a510f262e1b7fa98e124f4a160c252b3d63b04c2 [2023-11-25 00:06:26,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:26,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:26,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:26,494 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:26,494 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:26,496 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/array-fpi/brs3.c [2023-11-25 00:06:30,283 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:30,572 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:30,573 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/sv-benchmarks/c/array-fpi/brs3.c [2023-11-25 00:06:30,582 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/data/37bcf1bcb/8ac384025d7f483abf01a1140a2d105f/FLAG1bb0f8896 [2023-11-25 00:06:30,597 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/data/37bcf1bcb/8ac384025d7f483abf01a1140a2d105f [2023-11-25 00:06:30,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:30,602 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:30,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:30,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:30,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:30,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:30,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@497c96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30, skipping insertion in model container [2023-11-25 00:06:30,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:30,648 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:30,888 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_d872e777-c125-4ac0-86e9-24b5b606796d/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2023-11-25 00:06:30,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:30,932 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:06:30,946 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_d872e777-c125-4ac0-86e9-24b5b606796d/sv-benchmarks/c/array-fpi/brs3.c[587,600] [2023-11-25 00:06:30,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:30,977 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:06:30,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30 WrapperNode [2023-11-25 00:06:30,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:30,979 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:30,979 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:06:30,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:06:30,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:30,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,023 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-11-25 00:06:31,023 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:31,024 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:06:31,024 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:06:31,024 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:06:31,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,055 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,058 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,061 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:06:31,062 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:06:31,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:06:31,062 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:06:31,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (1/1) ... [2023-11-25 00:06:31,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:31,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:31,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:06:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:06:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:06:31,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:06:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:06:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:06:31,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:06:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:06:31,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:06:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:06:31,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:06:31,285 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:06:31,288 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:06:31,583 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:06:31,655 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:06:31,655 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-25 00:06:31,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:31 BoogieIcfgContainer [2023-11-25 00:06:31,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:06:31,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:06:31,661 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:06:31,665 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:06:31,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:06:30" (1/3) ... [2023-11-25 00:06:31,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d02b6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:31, skipping insertion in model container [2023-11-25 00:06:31,666 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:30" (2/3) ... [2023-11-25 00:06:31,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d02b6d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:31, skipping insertion in model container [2023-11-25 00:06:31,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:31" (3/3) ... [2023-11-25 00:06:31,668 INFO L112 eAbstractionObserver]: Analyzing ICFG brs3.c [2023-11-25 00:06:31,686 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:06:31,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:06:31,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:06:31,740 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;@1247a904, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:06:31,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:06:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 00:06:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:06:31,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:31,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-25 00:06:31,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:31,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1448994786, now seen corresponding path program 1 times [2023-11-25 00:06:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:31,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241077098] [2023-11-25 00:06:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:32,064 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 00:06:32,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:32,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241077098] [2023-11-25 00:06:32,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241077098] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:32,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:32,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:06:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107979903] [2023-11-25 00:06:32,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:32,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:32,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:32,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:32,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:32,113 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) 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 00:06:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:32,172 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2023-11-25 00:06:32,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:32,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) 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 6 [2023-11-25 00:06:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:32,187 INFO L225 Difference]: With dead ends: 18 [2023-11-25 00:06:32,187 INFO L226 Difference]: Without dead ends: 8 [2023-11-25 00:06:32,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 00:06:32,199 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:32,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:06:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-25 00:06:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-25 00:06:32,240 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 00:06:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-11-25 00:06:32,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2023-11-25 00:06:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:32,246 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-11-25 00:06:32,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) 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 00:06:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-11-25 00:06:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-25 00:06:32,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:32,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:32,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:06:32,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:32,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:32,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1973441861, now seen corresponding path program 1 times [2023-11-25 00:06:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:32,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662050149] [2023-11-25 00:06:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:32,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:32,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662050149] [2023-11-25 00:06:32,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662050149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:32,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:32,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-25 00:06:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237941510] [2023-11-25 00:06:32,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:32,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:06:32,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:06:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:32,570 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:32,625 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2023-11-25 00:06:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:06:32,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-25 00:06:32,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:32,627 INFO L225 Difference]: With dead ends: 12 [2023-11-25 00:06:32,627 INFO L226 Difference]: Without dead ends: 9 [2023-11-25 00:06:32,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:32,630 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:32,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:06:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-25 00:06:32,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-25 00:06:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 00:06:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-11-25 00:06:32,661 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2023-11-25 00:06:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:32,663 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-11-25 00:06:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-11-25 00:06:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-25 00:06:32,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:32,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:32,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:06:32,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:32,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1046873979, now seen corresponding path program 1 times [2023-11-25 00:06:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:32,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987575073] [2023-11-25 00:06:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:32,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:33,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:33,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987575073] [2023-11-25 00:06:33,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987575073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:33,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260930267] [2023-11-25 00:06:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:33,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:33,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:33,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:33,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:06:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:33,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-25 00:06:33,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:33,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-25 00:06:33,626 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 15 treesize of output 7 [2023-11-25 00:06:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:33,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:33,796 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:06:33,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2023-11-25 00:06:33,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-25 00:06:33,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 7 [2023-11-25 00:06:33,968 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 21 treesize of output 13 [2023-11-25 00:06:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:34,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260930267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:34,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529359134] [2023-11-25 00:06:34,058 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:06:34,058 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:34,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:34,071 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:34,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:35,028 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:35,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '135#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem10#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-25 00:06:35,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:35,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:06:35,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-25 00:06:35,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826693392] [2023-11-25 00:06:35,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-25 00:06:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-25 00:06:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:06:35,339 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:35,421 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2023-11-25 00:06:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:06:35,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-25 00:06:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:35,423 INFO L225 Difference]: With dead ends: 13 [2023-11-25 00:06:35,423 INFO L226 Difference]: Without dead ends: 10 [2023-11-25 00:06:35,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-11-25 00:06:35,426 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:35,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-25 00:06:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-25 00:06:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 00:06:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-25 00:06:35,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2023-11-25 00:06:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:35,444 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-25 00:06:35,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-25 00:06:35,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-25 00:06:35,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:35,447 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:35,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:35,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:35,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:35,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:35,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1906926587, now seen corresponding path program 2 times [2023-11-25 00:06:35,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:35,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617813678] [2023-11-25 00:06:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:35,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:35,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:35,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617813678] [2023-11-25 00:06:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617813678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:35,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841729694] [2023-11-25 00:06:35,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:06:35,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:35,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:35,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:35,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:06:36,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-25 00:06:36,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:06:36,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-25 00:06:36,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:36,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841729694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:36,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261371478] [2023-11-25 00:06:36,104 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:06:36,105 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:36,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:36,105 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:36,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:36,767 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:37,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '233#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem10#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-25 00:06:37,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:37,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:06:37,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-25 00:06:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442270080] [2023-11-25 00:06:37,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:37,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-25 00:06:37,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-25 00:06:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:06:37,069 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:37,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:37,158 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-11-25 00:06:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:06:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-25 00:06:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:37,160 INFO L225 Difference]: With dead ends: 17 [2023-11-25 00:06:37,161 INFO L226 Difference]: Without dead ends: 11 [2023-11-25 00:06:37,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-25 00:06:37,164 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:37,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-25 00:06:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-25 00:06:37,174 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 00:06:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-25 00:06:37,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2023-11-25 00:06:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:37,175 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-25 00:06:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-25 00:06:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-25 00:06:37,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:37,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:37,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:37,384 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:37,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1099829186, now seen corresponding path program 3 times [2023-11-25 00:06:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:37,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770695680] [2023-11-25 00:06:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:37,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:38,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:38,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770695680] [2023-11-25 00:06:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770695680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375522264] [2023-11-25 00:06:38,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:06:38,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:38,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:38,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:06:38,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:06:38,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:06:38,459 WARN L260 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-25 00:06:38,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:38,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 51 [2023-11-25 00:06:38,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 3 [2023-11-25 00:06:38,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 20 treesize of output 9 [2023-11-25 00:06:38,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 3 [2023-11-25 00:06:38,871 INFO L349 Elim1Store]: treesize reduction 63, result has 55.9 percent of original size [2023-11-25 00:06:38,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 104 [2023-11-25 00:06:39,343 INFO L349 Elim1Store]: treesize reduction 121, result has 52.7 percent of original size [2023-11-25 00:06:39,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 76 treesize of output 162 [2023-11-25 00:06:40,167 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 15 treesize of output 7 [2023-11-25 00:06:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:40,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:40,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 7 [2023-11-25 00:06:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:40,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375522264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:40,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749277691] [2023-11-25 00:06:40,627 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:06:40,627 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:40,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:40,628 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:40,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:41,154 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:41,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '355#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem10#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-25 00:06:41,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:41,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:06:41,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2023-11-25 00:06:41,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921135213] [2023-11-25 00:06:41,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:41,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-25 00:06:41,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:41,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-25 00:06:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-11-25 00:06:41,546 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 00:06:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:43,580 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-11-25 00:06:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-25 00:06:43,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-25 00:06:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:43,582 INFO L225 Difference]: With dead ends: 17 [2023-11-25 00:06:43,582 INFO L226 Difference]: Without dead ends: 13 [2023-11-25 00:06:43,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2023-11-25 00:06:43,584 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:43,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 20 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-25 00:06:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-25 00:06:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-25 00:06:43,595 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 00:06:43,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-25 00:06:43,596 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2023-11-25 00:06:43,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:43,597 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-25 00:06:43,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 00:06:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-25 00:06:43,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-25 00:06:43,598 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:43,598 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:43,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:43,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:43,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash -364882754, now seen corresponding path program 4 times [2023-11-25 00:06:43,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:43,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413004486] [2023-11-25 00:06:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:43,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:44,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:44,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413004486] [2023-11-25 00:06:44,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413004486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:44,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417030932] [2023-11-25 00:06:44,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-25 00:06:44,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:44,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:44,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:06:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:44,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-25 00:06:44,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:44,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:06:44,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417030932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:44,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867008102] [2023-11-25 00:06:44,281 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:06:44,281 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:44,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:44,282 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:44,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:44,723 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:44,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '508#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem10#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-25 00:06:44,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:44,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:06:44,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2023-11-25 00:06:44,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269582204] [2023-11-25 00:06:44,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:44,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-25 00:06:44,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-25 00:06:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-25 00:06:45,000 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:45,113 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-11-25 00:06:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-25 00:06:45,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-25 00:06:45,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:45,117 INFO L225 Difference]: With dead ends: 22 [2023-11-25 00:06:45,117 INFO L226 Difference]: Without dead ends: 14 [2023-11-25 00:06:45,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-25 00:06:45,119 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:45,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-25 00:06:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-25 00:06:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-25 00:06:45,134 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-11-25 00:06:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:45,135 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-25 00:06:45,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-25 00:06:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-25 00:06:45,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:45,137 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:45,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:45,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:45,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:45,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1211809179, now seen corresponding path program 5 times [2023-11-25 00:06:45,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:45,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381384294] [2023-11-25 00:06:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:45,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381384294] [2023-11-25 00:06:45,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381384294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041717943] [2023-11-25 00:06:45,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-25 00:06:45,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:45,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:45,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:45,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-25 00:06:45,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-25 00:06:45,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:06:45,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-25 00:06:45,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:45,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:45,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:06:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:45,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041717943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:06:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [900025607] [2023-11-25 00:06:45,906 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-25 00:06:45,906 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:06:45,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:06:45,907 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:06:45,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:06:46,364 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:06:46,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '664#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ (* 3 ~N~0) 1) |ULTIMATE.start_main_#t~mem10#1|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-25 00:06:46,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:06:46,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:06:46,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-11-25 00:06:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14862285] [2023-11-25 00:06:46,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:06:46,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:06:46,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:06:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-25 00:06:46,672 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:46,799 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-11-25 00:06:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:06:46,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-25 00:06:46,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:46,800 INFO L225 Difference]: With dead ends: 23 [2023-11-25 00:06:46,800 INFO L226 Difference]: Without dead ends: 15 [2023-11-25 00:06:46,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2023-11-25 00:06:46,803 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:46,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:06:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-25 00:06:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-25 00:06:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-25 00:06:46,818 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2023-11-25 00:06:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:46,818 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-25 00:06:46,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-25 00:06:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-25 00:06:46,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:46,821 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:46,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-25 00:06:47,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:47,028 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:47,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1450348450, now seen corresponding path program 6 times [2023-11-25 00:06:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:47,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026528556] [2023-11-25 00:06:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:47,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:49,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:49,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026528556] [2023-11-25 00:06:49,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026528556] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:06:49,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646307947] [2023-11-25 00:06:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-25 00:06:49,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:06:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:49,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:06:49,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d872e777-c125-4ac0-86e9-24b5b606796d/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-25 00:06:49,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-25 00:06:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-25 00:06:49,921 WARN L260 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-25 00:06:49,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:06:49,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-25 00:06:49,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-25 00:06:50,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 105 [2023-11-25 00:06:50,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2023-11-25 00:06:50,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 84 treesize of output 68 [2023-11-25 00:06:50,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 40 [2023-11-25 00:06:50,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-25 00:06:50,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 150 [2023-11-25 00:06:50,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 158 treesize of output 140 [2023-11-25 00:06:50,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 106 [2023-11-25 00:06:50,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 76 [2023-11-25 00:06:51,825 INFO L349 Elim1Store]: treesize reduction 546, result has 42.3 percent of original size [2023-11-25 00:06:51,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 179 treesize of output 465 [2023-11-25 00:06:54,572 INFO L349 Elim1Store]: treesize reduction 225, result has 48.6 percent of original size [2023-11-25 00:06:54,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 358 treesize of output 434 [2023-11-25 00:06:56,973 INFO L349 Elim1Store]: treesize reduction 285, result has 45.9 percent of original size [2023-11-25 00:06:56,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 538 treesize of output 565 [2023-11-25 00:07:02,383 INFO L349 Elim1Store]: treesize reduction 347, result has 45.4 percent of original size [2023-11-25 00:07:02,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 748 treesize of output 702