./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/verifythis/lcp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/lcp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:15:10,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:15:10,878 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 21:15:10,889 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:15:10,890 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:15:10,940 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:15:10,942 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:15:10,942 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:15:10,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:15:10,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:15:10,951 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:15:10,952 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:15:10,952 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:15:10,954 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:15:10,955 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:15:10,955 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:15:10,955 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:15:10,956 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:15:10,956 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:15:10,957 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:15:10,957 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:15:10,958 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:15:10,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:15:10,960 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:15:10,960 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:15:10,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:15:10,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:15:10,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:15:10,962 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:15:10,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:15:10,963 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:15:10,964 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:15:10,964 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:15:10,964 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:15:10,965 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:15:10,965 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:15:10,966 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:15:10,966 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:15:10,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:15:10,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:10,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:15:10,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:15:10,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:15:10,968 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:15:10,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:15:10,969 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:15:10,969 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:15:10,969 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:15:10,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:15:10,969 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_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a [2023-11-23 21:15:11,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:15:11,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:15:11,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:15:11,346 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:15:11,347 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:15:11,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/verifythis/lcp.c [2023-11-23 21:15:14,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:15:14,685 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:15:14,686 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/sv-benchmarks/c/verifythis/lcp.c [2023-11-23 21:15:14,696 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/data/afb5bf13b/89253c54f9274ed6af08e05d9f2496b3/FLAGbe682e4e0 [2023-11-23 21:15:14,711 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/data/afb5bf13b/89253c54f9274ed6af08e05d9f2496b3 [2023-11-23 21:15:14,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:15:14,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:15:14,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:14,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:15:14,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:15:14,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:14,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f73aa04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:14, skipping insertion in model container [2023-11-23 21:15:14,729 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:14" (1/1) ... [2023-11-23 21:15:14,760 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:15:14,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:14,964 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:15:14,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:15,004 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:15:15,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15 WrapperNode [2023-11-23 21:15:15,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:15,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:15,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:15:15,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:15:15,012 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,020 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,048 INFO L138 Inliner]: procedures = 20, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 124 [2023-11-23 21:15:15,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:15,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:15:15,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:15:15,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:15:15,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,070 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,070 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,085 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,087 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:15:15,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:15:15,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:15:15,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:15:15,098 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (1/1) ... [2023-11-23 21:15:15,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:15,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:15,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:15:15,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:15:15,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:15:15,189 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:15:15,190 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:15:15,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:15:15,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:15:15,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:15:15,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:15:15,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:15:15,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:15:15,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:15:15,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:15:15,275 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:15:15,278 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:15:15,611 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:15:15,659 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:15:15,659 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:15:15,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:15 BoogieIcfgContainer [2023-11-23 21:15:15,661 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:15:15,664 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:15:15,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:15:15,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:15:15,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:14" (1/3) ... [2023-11-23 21:15:15,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394e5623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:15, skipping insertion in model container [2023-11-23 21:15:15,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:15" (2/3) ... [2023-11-23 21:15:15,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394e5623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:15, skipping insertion in model container [2023-11-23 21:15:15,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:15" (3/3) ... [2023-11-23 21:15:15,671 INFO L112 eAbstractionObserver]: Analyzing ICFG lcp.c [2023-11-23 21:15:15,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:15:15,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-23 21:15:15,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:15:15,757 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;@65e738ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:15:15,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-23 21:15:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:15:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:15:15,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:15,771 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:15,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -185104081, now seen corresponding path program 1 times [2023-11-23 21:15:15,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:15,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206984474] [2023-11-23 21:15:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:16,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:16,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206984474] [2023-11-23 21:15:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206984474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:16,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:16,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:16,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055519520] [2023-11-23 21:15:16,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:16,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:16,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:16,276 INFO L87 Difference]: Start difference. First operand has 67 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:16,476 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2023-11-23 21:15:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:16,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 10 [2023-11-23 21:15:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:16,489 INFO L225 Difference]: With dead ends: 130 [2023-11-23 21:15:16,489 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 21:15:16,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:16,501 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 109 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:16,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 107 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 21:15:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2023-11-23 21:15:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.697674418604651) internal successors, (73), 64 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-11-23 21:15:16,579 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 10 [2023-11-23 21:15:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:16,581 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-11-23 21:15:16,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-11-23 21:15:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:15:16,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:16,584 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:16,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:15:16,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:16,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1443259169, now seen corresponding path program 1 times [2023-11-23 21:15:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:16,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941819399] [2023-11-23 21:15:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:16,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:16,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941819399] [2023-11-23 21:15:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941819399] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:16,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523768959] [2023-11-23 21:15:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:16,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:16,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:16,766 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:16,902 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-11-23 21:15:16,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:16,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2023-11-23 21:15:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:16,907 INFO L225 Difference]: With dead ends: 86 [2023-11-23 21:15:16,909 INFO L226 Difference]: Without dead ends: 84 [2023-11-23 21:15:16,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:16,911 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 101 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:16,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 98 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-23 21:15:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2023-11-23 21:15:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 65 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2023-11-23 21:15:16,932 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 11 [2023-11-23 21:15:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:16,933 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2023-11-23 21:15:16,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2023-11-23 21:15:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:15:16,935 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:16,935 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:16,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:15:16,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:16,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:16,937 INFO L85 PathProgramCache]: Analyzing trace with hash 302376769, now seen corresponding path program 1 times [2023-11-23 21:15:16,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:16,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909016885] [2023-11-23 21:15:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:16,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:17,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:17,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909016885] [2023-11-23 21:15:17,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909016885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:17,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:17,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391588788] [2023-11-23 21:15:17,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:17,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:17,126 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:17,216 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2023-11-23 21:15:17,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-11-23 21:15:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:17,223 INFO L225 Difference]: With dead ends: 84 [2023-11-23 21:15:17,224 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 21:15:17,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:17,227 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 95 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:17,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 21:15:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2023-11-23 21:15:17,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 66 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2023-11-23 21:15:17,245 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 13 [2023-11-23 21:15:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:17,246 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2023-11-23 21:15:17,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2023-11-23 21:15:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:15:17,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:17,248 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:17,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:15:17,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:17,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash 783745300, now seen corresponding path program 1 times [2023-11-23 21:15:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:17,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280928983] [2023-11-23 21:15:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:17,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:17,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:17,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280928983] [2023-11-23 21:15:17,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280928983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:17,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:17,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206589203] [2023-11-23 21:15:17,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:17,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:17,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:17,394 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:17,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:17,460 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2023-11-23 21:15:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:17,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-11-23 21:15:17,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:17,462 INFO L225 Difference]: With dead ends: 82 [2023-11-23 21:15:17,462 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:15:17,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:17,464 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 90 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:17,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 102 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:15:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:15:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2023-11-23 21:15:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 67 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2023-11-23 21:15:17,476 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 14 [2023-11-23 21:15:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:17,477 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2023-11-23 21:15:17,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2023-11-23 21:15:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:15:17,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:17,478 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:17,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:15:17,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:17,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1565695143, now seen corresponding path program 1 times [2023-11-23 21:15:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:17,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821810255] [2023-11-23 21:15:17,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:17,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:17,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821810255] [2023-11-23 21:15:17,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821810255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:17,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:17,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:17,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540821741] [2023-11-23 21:15:17,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:17,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:15:17,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:15:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:15:17,514 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:17,538 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2023-11-23 21:15:17,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:15:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-23 21:15:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:17,540 INFO L225 Difference]: With dead ends: 133 [2023-11-23 21:15:17,540 INFO L226 Difference]: Without dead ends: 75 [2023-11-23 21:15:17,541 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 [2023-11-23 21:15:17,542 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:17,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:15:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-23 21:15:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-23 21:15:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.574468085106383) internal successors, (74), 68 states have internal predecessors, (74), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:17,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2023-11-23 21:15:17,552 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 16 [2023-11-23 21:15:17,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:17,552 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2023-11-23 21:15:17,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2023-11-23 21:15:17,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:15:17,554 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:17,554 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:17,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:15:17,554 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:17,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:17,555 INFO L85 PathProgramCache]: Analyzing trace with hash 91271211, now seen corresponding path program 1 times [2023-11-23 21:15:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:17,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828549685] [2023-11-23 21:15:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:17,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:15:18,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:18,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828549685] [2023-11-23 21:15:18,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828549685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:18,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21488795] [2023-11-23 21:15:18,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:18,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:18,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:18,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:18,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:15:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:18,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:15:18,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:15:18,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:18,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21488795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:18,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:18,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-23 21:15:18,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555881286] [2023-11-23 21:15:18,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:18,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:15:18,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:15:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:15:18,303 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 6 states, 3 states have (on average 4.333333333333333) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:15:18,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:18,405 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-11-23 21:15:18,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:15:18,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 4.333333333333333) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-11-23 21:15:18,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:18,407 INFO L225 Difference]: With dead ends: 75 [2023-11-23 21:15:18,407 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 21:15:18,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:15:18,414 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 100 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:18,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 21:15:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-23 21:15:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.553191489361702) internal successors, (73), 67 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2023-11-23 21:15:18,435 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 20 [2023-11-23 21:15:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:18,435 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2023-11-23 21:15:18,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 4.333333333333333) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:15:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2023-11-23 21:15:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 21:15:18,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:18,438 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:18,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:18,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:15:18,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:18,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1465559664, now seen corresponding path program 1 times [2023-11-23 21:15:18,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:18,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77566844] [2023-11-23 21:15:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:15:18,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:18,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77566844] [2023-11-23 21:15:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77566844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:18,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:15:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104846409] [2023-11-23 21:15:18,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:15:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:15:18,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:15:18,870 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 7 states, 4 states have (on average 3.5) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:15:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:19,032 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2023-11-23 21:15:19,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:15:19,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 3.5) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2023-11-23 21:15:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:19,033 INFO L225 Difference]: With dead ends: 111 [2023-11-23 21:15:19,034 INFO L226 Difference]: Without dead ends: 79 [2023-11-23 21:15:19,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:15:19,036 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 68 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:19,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 203 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-23 21:15:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2023-11-23 21:15:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 68 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-11-23 21:15:19,065 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 21 [2023-11-23 21:15:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:19,065 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-11-23 21:15:19,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 3.5) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:15:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-11-23 21:15:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:15:19,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:19,067 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:19,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:15:19,069 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:19,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash -632453087, now seen corresponding path program 1 times [2023-11-23 21:15:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61104895] [2023-11-23 21:15:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:19,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61104895] [2023-11-23 21:15:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61104895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:19,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:19,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:15:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344342011] [2023-11-23 21:15:19,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:19,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:19,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:19,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:19,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:19,129 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:19,194 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-11-23 21:15:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:15:19,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-23 21:15:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:19,196 INFO L225 Difference]: With dead ends: 79 [2023-11-23 21:15:19,196 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 21:15:19,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:19,198 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:19,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 142 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 21:15:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-23 21:15:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.5) internal successors, (75), 70 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2023-11-23 21:15:19,206 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 20 [2023-11-23 21:15:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:19,207 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2023-11-23 21:15:19,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2023-11-23 21:15:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 21:15:19,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:19,208 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:19,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:15:19,210 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:19,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:19,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2097941949, now seen corresponding path program 1 times [2023-11-23 21:15:19,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:19,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73608065] [2023-11-23 21:15:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:19,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:19,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:19,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73608065] [2023-11-23 21:15:19,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73608065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:19,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:19,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:15:19,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162949811] [2023-11-23 21:15:19,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:19,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:15:19,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:15:19,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:15:19,262 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:19,302 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2023-11-23 21:15:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:15:19,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-23 21:15:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:19,305 INFO L225 Difference]: With dead ends: 147 [2023-11-23 21:15:19,305 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:15:19,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:19,308 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:19,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 168 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:15:19,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:15:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-11-23 21:15:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-11-23 21:15:19,320 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 22 [2023-11-23 21:15:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:19,321 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-11-23 21:15:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-11-23 21:15:19,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:15:19,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:19,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:19,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:15:19,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:19,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:19,324 INFO L85 PathProgramCache]: Analyzing trace with hash -142250855, now seen corresponding path program 1 times [2023-11-23 21:15:19,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:19,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420046419] [2023-11-23 21:15:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:19,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:19,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420046419] [2023-11-23 21:15:19,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420046419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447006657] [2023-11-23 21:15:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:19,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:19,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:19,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:19,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:15:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:19,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:15:19,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:19,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:19,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447006657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:19,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:19,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:15:19,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016477054] [2023-11-23 21:15:19,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:19,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:15:19,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:15:19,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:15:19,663 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:19,790 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2023-11-23 21:15:19,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:15:19,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-11-23 21:15:19,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:19,792 INFO L225 Difference]: With dead ends: 79 [2023-11-23 21:15:19,792 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 21:15:19,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:15:19,793 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 78 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:19,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 162 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 21:15:19,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-23 21:15:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 69 states have internal predecessors, (73), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2023-11-23 21:15:19,800 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 24 [2023-11-23 21:15:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:19,800 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2023-11-23 21:15:19,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2023-11-23 21:15:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 21:15:19,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:19,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:19,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:20,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:15:20,015 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:20,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:20,016 INFO L85 PathProgramCache]: Analyzing trace with hash -114809163, now seen corresponding path program 1 times [2023-11-23 21:15:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:20,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532529867] [2023-11-23 21:15:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:20,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:20,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:20,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532529867] [2023-11-23 21:15:20,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532529867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:20,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283721484] [2023-11-23 21:15:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:20,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:20,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:20,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:20,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:15:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:20,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:15:20,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:20,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:20,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283721484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:20,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1628357167] [2023-11-23 21:15:20,472 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-23 21:15:20,473 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:20,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:20,483 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:20,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:23,611 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 149 for LOIs [2023-11-23 21:15:23,697 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:27,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2363#(and (<= 0 |ULTIMATE.start_lcp_~n#1|) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_lcp_#in~x#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 2147483648 (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_lcp_~x#1|)) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_lcp_~y#1|) (<= |ULTIMATE.start_lcp_~x#1| 2147483647) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= |ULTIMATE.start_lcp_~y#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_lcp_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc17#1.offset| 0) (<= |ULTIMATE.start_lcp_~l~0#1| 2147483647) (= |ULTIMATE.start_lcp_~a#1.offset| 0) (<= |ULTIMATE.start_lcp_#in~y#1| 2147483647) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= |ULTIMATE.start_lcp_~n#1| 1073741823) (<= 0 |ULTIMATE.start_lcp_#in~n#1|) (<= |ULTIMATE.start_lcp_#in~x#1| 2147483647) (<= 0 |ULTIMATE.start_lcp_#in~y#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_lcp_#in~n#1| 1073741823))' at error location [2023-11-23 21:15:27,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:27,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:27,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-23 21:15:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079571423] [2023-11-23 21:15:27,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:27,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:15:27,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:27,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:15:27,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:15:27,679 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:28,018 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-11-23 21:15:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:15:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-23 21:15:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:28,020 INFO L225 Difference]: With dead ends: 78 [2023-11-23 21:15:28,020 INFO L226 Difference]: Without dead ends: 76 [2023-11-23 21:15:28,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 21:15:28,022 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 127 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:28,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 298 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-23 21:15:28,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-11-23 21:15:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.3653846153846154) internal successors, (71), 67 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:28,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2023-11-23 21:15:28,028 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 25 [2023-11-23 21:15:28,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:28,028 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2023-11-23 21:15:28,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2023-11-23 21:15:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 21:15:28,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:28,030 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:28,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:28,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:15:28,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:28,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:28,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1337545623, now seen corresponding path program 1 times [2023-11-23 21:15:28,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:28,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827005187] [2023-11-23 21:15:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:28,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:28,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:28,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827005187] [2023-11-23 21:15:28,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827005187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:28,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990471859] [2023-11-23 21:15:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:28,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:28,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:28,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:28,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:15:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:28,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:15:28,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:28,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:28,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990471859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:28,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:28,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:15:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186812738] [2023-11-23 21:15:28,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:28,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:15:28,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:28,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:15:28,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:15:28,580 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:28,689 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2023-11-23 21:15:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:15:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-11-23 21:15:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:28,691 INFO L225 Difference]: With dead ends: 74 [2023-11-23 21:15:28,691 INFO L226 Difference]: Without dead ends: 72 [2023-11-23 21:15:28,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:15:28,692 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:28,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 162 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-23 21:15:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-23 21:15:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 65 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-11-23 21:15:28,698 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 27 [2023-11-23 21:15:28,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:28,698 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-11-23 21:15:28,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:15:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-11-23 21:15:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:15:28,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:28,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:28,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:28,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:15:28,917 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:28,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:28,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1485758594, now seen corresponding path program 1 times [2023-11-23 21:15:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:28,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541105664] [2023-11-23 21:15:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:28,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:29,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:29,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541105664] [2023-11-23 21:15:29,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541105664] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:29,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532887768] [2023-11-23 21:15:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:29,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:29,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:29,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:15:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:29,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:15:29,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:29,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532887768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:29,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1165627339] [2023-11-23 21:15:29,384 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-23 21:15:29,385 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:29,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:29,386 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:29,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:31,960 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 149 for LOIs [2023-11-23 21:15:32,028 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:35,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2997#(and (<= 1 |ULTIMATE.start_lcp_#in~n#1|) (<= 2147483648 (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_lcp_~y#1|)) (<= |ULTIMATE.start_main_~x~0#1| 1073741822) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_lcp_#in~x#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_lcp_#in~x#1| 1073741822) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_lcp_~l~0#1| 1073741822) (<= |ULTIMATE.start_lcp_~y#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_lcp_~x#1| 1073741822) (= |ULTIMATE.start_lcp_#in~a#1.offset| 0) (<= 0 |ULTIMATE.start_lcp_~x#1|) (<= 1 |ULTIMATE.start_lcp_~n#1|) (= |ULTIMATE.start_main_#t~malloc17#1.offset| 0) (= |ULTIMATE.start_lcp_~a#1.offset| 0) (<= |ULTIMATE.start_lcp_#in~y#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= |ULTIMATE.start_lcp_~n#1| 1073741823) (<= 0 |ULTIMATE.start_lcp_#in~y#1|) (<= |ULTIMATE.start_lcp_#in~n#1| 1073741823))' at error location [2023-11-23 21:15:35,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:35,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:35,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-23 21:15:35,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790303122] [2023-11-23 21:15:35,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:15:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:35,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:15:35,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:15:35,732 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:36,137 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-11-23 21:15:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:15:36,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-11-23 21:15:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:36,138 INFO L225 Difference]: With dead ends: 73 [2023-11-23 21:15:36,138 INFO L226 Difference]: Without dead ends: 71 [2023-11-23 21:15:36,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2023-11-23 21:15:36,140 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 123 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:36,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 258 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:15:36,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-23 21:15:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-11-23 21:15:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 63 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2023-11-23 21:15:36,145 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 28 [2023-11-23 21:15:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:36,145 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2023-11-23 21:15:36,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2023-11-23 21:15:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:15:36,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:36,147 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:36,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:36,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:36,348 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:36,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:36,348 INFO L85 PathProgramCache]: Analyzing trace with hash 824839142, now seen corresponding path program 1 times [2023-11-23 21:15:36,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:36,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469018674] [2023-11-23 21:15:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:15:36,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:36,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469018674] [2023-11-23 21:15:36,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469018674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:36,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614832588] [2023-11-23 21:15:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:36,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:36,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:36,792 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:36,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:15:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:36,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:15:36,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:37,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:15:37,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:15:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614832588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:37,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1541544300] [2023-11-23 21:15:37,449 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-23 21:15:37,449 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:37,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:37,449 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:37,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:39,887 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:15:39,888 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:43,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3423#(and (= |ULTIMATE.start_check_#in~y#1| |ULTIMATE.start_check_~y#1|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_check_~a#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_check_#in~x#1|) (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_check_#in~y#1|) (<= 2147483648 (+ |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~x#1|)) (= |ULTIMATE.start_main_#t~malloc17#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (= |ULTIMATE.start_main_~l~1#1| |ULTIMATE.start_check_#in~l#1|) (<= |ULTIMATE.start_lcp_#res#1| 2147483647) (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~l#1|) (= |ULTIMATE.start_main_~l~1#1| |ULTIMATE.start_lcp_#res#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_check_#in~x#1| |ULTIMATE.start_check_~x#1|) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_check_#in~l#1| |ULTIMATE.start_check_~l#1|))' at error location [2023-11-23 21:15:43,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:43,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:43,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-11-23 21:15:43,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159772657] [2023-11-23 21:15:43,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:43,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 21:15:43,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 21:15:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2023-11-23 21:15:43,656 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 28 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 28 states have internal predecessors, (80), 7 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-23 21:15:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:44,529 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2023-11-23 21:15:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:15:44,529 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 28 states have internal predecessors, (80), 7 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 35 [2023-11-23 21:15:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:44,535 INFO L225 Difference]: With dead ends: 116 [2023-11-23 21:15:44,535 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 21:15:44,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=445, Invalid=3095, Unknown=0, NotChecked=0, Total=3540 [2023-11-23 21:15:44,537 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 525 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:44,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 175 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:15:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 21:15:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 67. [2023-11-23 21:15:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 60 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2023-11-23 21:15:44,544 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 35 [2023-11-23 21:15:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:44,545 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2023-11-23 21:15:44,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 28 states have internal predecessors, (80), 7 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2023-11-23 21:15:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2023-11-23 21:15:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:15:44,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:44,546 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:44,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:44,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:44,768 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:44,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:44,769 INFO L85 PathProgramCache]: Analyzing trace with hash -199790281, now seen corresponding path program 1 times [2023-11-23 21:15:44,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:44,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805912613] [2023-11-23 21:15:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:15:44,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:44,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805912613] [2023-11-23 21:15:44,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805912613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:44,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264245582] [2023-11-23 21:15:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:44,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:44,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:44,993 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:45,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:15:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:45,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:15:45,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:15:45,154 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:45,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264245582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:45,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:45,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:15:45,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984950040] [2023-11-23 21:15:45,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:45,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:15:45,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:45,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:15:45,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:15:45,156 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 6 states, 3 states have (on average 8.666666666666666) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:15:45,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:45,229 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-11-23 21:15:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:15:45,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 8.666666666666666) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2023-11-23 21:15:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:45,231 INFO L225 Difference]: With dead ends: 67 [2023-11-23 21:15:45,231 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 21:15:45,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:15:45,234 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:45,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:45,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 21:15:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-23 21:15:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 59 states have internal predecessors, (63), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:15:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-11-23 21:15:45,239 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 36 [2023-11-23 21:15:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:45,239 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-11-23 21:15:45,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 8.666666666666666) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:15:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-11-23 21:15:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:15:45,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:45,240 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:45,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:45,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:15:45,445 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:45,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:45,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1898531320, now seen corresponding path program 1 times [2023-11-23 21:15:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:45,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605748971] [2023-11-23 21:15:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:45,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:15:45,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605748971] [2023-11-23 21:15:45,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605748971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:45,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426724649] [2023-11-23 21:15:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:45,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:45,797 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:45,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:15:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:45,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:15:45,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:15:46,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:15:46,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426724649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:46,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455501938] [2023-11-23 21:15:46,419 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:15:46,420 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:46,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:46,420 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:46,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:48,660 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:15:48,662 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:52,807 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4180#(and (= |ULTIMATE.start_check_#in~y#1| |ULTIMATE.start_check_~y#1|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_check_#in~a#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ (* 4 |ULTIMATE.start_check_~x#1|) (* |ULTIMATE.start_check_~i~0#1| 4))) |ULTIMATE.start_check_#t~mem11#1|) (<= 2147483648 (+ |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~y#1|)) (<= |ULTIMATE.start_check_#in~l#1| 2147483647) (= |ULTIMATE.start_check_~a#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_check_#in~x#1|) (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_check_#in~y#1|) (= |ULTIMATE.start_main_#t~malloc17#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (= |ULTIMATE.start_main_~l~1#1| |ULTIMATE.start_check_#in~l#1|) (<= (+ |ULTIMATE.start_check_~i~0#1| 1) |ULTIMATE.start_check_~l#1|) (<= (+ |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~x#1|) 2147483647) (= |ULTIMATE.start_main_~l~1#1| |ULTIMATE.start_lcp_#res#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_check_#in~x#1| |ULTIMATE.start_check_~x#1|) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= 0 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_check_#in~l#1| |ULTIMATE.start_check_~l#1|))' at error location [2023-11-23 21:15:52,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:52,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:52,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-23 21:15:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862835620] [2023-11-23 21:15:52,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:52,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 21:15:52,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 21:15:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2023-11-23 21:15:52,810 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 25 states, 24 states have (on average 2.625) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:15:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:53,741 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2023-11-23 21:15:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:15:53,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-11-23 21:15:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:53,742 INFO L225 Difference]: With dead ends: 93 [2023-11-23 21:15:53,743 INFO L226 Difference]: Without dead ends: 92 [2023-11-23 21:15:53,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=394, Invalid=3028, Unknown=0, NotChecked=0, Total=3422 [2023-11-23 21:15:53,745 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 252 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:53,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 322 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:15:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-23 21:15:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2023-11-23 21:15:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 65 states have internal predecessors, (69), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:15:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2023-11-23 21:15:53,752 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 37 [2023-11-23 21:15:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:53,753 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2023-11-23 21:15:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.625) internal successors, (63), 25 states have internal predecessors, (63), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:15:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2023-11-23 21:15:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:15:53,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:53,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:53,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:53,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 21:15:53,969 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:53,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:53,969 INFO L85 PathProgramCache]: Analyzing trace with hash -448443703, now seen corresponding path program 1 times [2023-11-23 21:15:53,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:53,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41980723] [2023-11-23 21:15:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:53,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:54,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:54,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41980723] [2023-11-23 21:15:54,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41980723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:54,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943051549] [2023-11-23 21:15:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:54,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:54,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:54,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:54,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:15:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:54,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:15:54,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:54,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:15:54,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943051549] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:54,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1600702309] [2023-11-23 21:15:54,253 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-11-23 21:15:54,253 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:54,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:54,254 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:54,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:55,984 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 149 for LOIs [2023-11-23 21:15:56,027 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:59,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4643#(and (<= 1 |ULTIMATE.start_lcp_#in~n#1|) (<= |ULTIMATE.start_main_~x~0#1| 1073741822) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_lcp_#in~x#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_lcp_#in~x#1| 1073741822) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_lcp_~y#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_lcp_~x#1| 1073741822) (= |ULTIMATE.start_lcp_#in~a#1.offset| 0) (<= |ULTIMATE.start_main_~y~0#1| 1073741822) (= |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_lcp_#t~post9#1|) (<= 0 |ULTIMATE.start_lcp_~x#1|) (<= 1 |ULTIMATE.start_lcp_~n#1|) (= |ULTIMATE.start_main_#t~malloc17#1.offset| 0) (<= 2147483647 |ULTIMATE.start_lcp_#t~post9#1|) (= |ULTIMATE.start_lcp_~a#1.offset| 0) (<= |ULTIMATE.start_lcp_#in~y#1| 1073741822) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_lcp_~y#1| 1073741822) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= |ULTIMATE.start_lcp_~n#1| 1073741823) (<= 0 |ULTIMATE.start_lcp_#in~y#1|) (<= |ULTIMATE.start_lcp_#in~n#1| 1073741823))' at error location [2023-11-23 21:15:59,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:59,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:59,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 21:15:59,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569136375] [2023-11-23 21:15:59,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:59,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:15:59,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:59,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:15:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:15:59,352 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 12 states, 11 states have (on average 6.909090909090909) internal successors, (76), 12 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:59,534 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2023-11-23 21:15:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:15:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.909090909090909) internal successors, (76), 12 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-11-23 21:15:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:59,536 INFO L225 Difference]: With dead ends: 134 [2023-11-23 21:15:59,536 INFO L226 Difference]: Without dead ends: 133 [2023-11-23 21:15:59,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2023-11-23 21:15:59,538 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:59,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 306 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:15:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-23 21:15:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2023-11-23 21:15:59,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 100 states have (on average 1.2) internal successors, (120), 107 states have internal predecessors, (120), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:15:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2023-11-23 21:15:59,548 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 37 [2023-11-23 21:15:59,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:59,549 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2023-11-23 21:15:59,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.909090909090909) internal successors, (76), 12 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:15:59,549 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2023-11-23 21:15:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:15:59,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:59,550 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:59,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:59,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:15:59,765 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-11-23 21:15:59,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1722919636, now seen corresponding path program 1 times [2023-11-23 21:15:59,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:59,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569920653] [2023-11-23 21:15:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:59,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:16:00,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569920653] [2023-11-23 21:16:00,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569920653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087666191] [2023-11-23 21:16:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:00,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:00,262 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:00,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46c46e59-5a4a-461a-b8c0-7e23ea9c98db/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:16:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:00,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:16:00,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:16:00,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:16:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:16:00,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087666191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:16:00,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [5715720] [2023-11-23 21:16:00,838 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-23 21:16:00,838 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:16:00,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:16:00,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:16:00,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs