./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91 --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 fdc85b042221b41aa26e62667e19ce1f6c246be9a2cb4f81fe8b15c8429db160 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:05:21,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:05:21,704 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-25 00:05:21,721 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:05:21,722 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:05:21,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:05:21,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:05:21,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:05:21,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:05:21,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:05:21,785 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:05:21,786 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:05:21,787 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:05:21,789 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:05:21,790 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:05:21,790 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:05:21,791 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:05:21,791 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:05:21,792 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:05:21,792 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:05:21,793 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:05:21,794 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:05:21,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:05:21,796 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:05:21,797 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:05:21,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:05:21,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:05:21,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:05:21,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:05:21,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:05:21,801 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:05:21,802 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-25 00:05:21,802 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-25 00:05:21,803 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:05:21,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:05:21,803 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:05:21,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:05:21,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:05:21,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:05:21,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:21,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:05:21,806 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:05:21,806 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:05:21,806 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:05:21,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:05:21,808 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:05:21,808 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:05:21,808 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:05:21,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:05:21,809 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_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fdc85b042221b41aa26e62667e19ce1f6c246be9a2cb4f81fe8b15c8429db160 [2023-11-25 00:05:22,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:05:22,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:05:22,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:05:22,226 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:05:22,227 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:05:22,229 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test1-1.i [2023-11-25 00:05:25,397 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:05:25,872 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:05:25,873 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_nondet_test1-1.i [2023-11-25 00:05:25,893 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/data/fde175c95/e10874c609514b058ebad035be17887d/FLAG7c7120cce [2023-11-25 00:05:25,920 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/data/fde175c95/e10874c609514b058ebad035be17887d [2023-11-25 00:05:25,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:05:25,929 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:05:25,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:25,936 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:05:25,943 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:05:25,944 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:25" (1/1) ... [2023-11-25 00:05:25,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6939b9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:25, skipping insertion in model container [2023-11-25 00:05:25,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:05:25" (1/1) ... [2023-11-25 00:05:26,042 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:05:26,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:26,785 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:05:26,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:05:26,962 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:05:26,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26 WrapperNode [2023-11-25 00:05:26,962 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:05:26,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:26,964 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:05:26,964 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:05:26,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,008 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,080 INFO L138 Inliner]: procedures = 177, calls = 177, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 760 [2023-11-25 00:05:27,080 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:05:27,081 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:05:27,081 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:05:27,081 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:05:27,092 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,104 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,148 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,162 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,184 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,190 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:05:27,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:05:27,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:05:27,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:05:27,223 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (1/1) ... [2023-11-25 00:05:27,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:05:27,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:05:27,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:05:27,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53c4a05b-a931-450f-be0d-690d5ebb46d0/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:05:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:05:27,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:05:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-25 00:05:27,353 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-25 00:05:27,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:05:27,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:05:27,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:05:27,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:05:27,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:05:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:05:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:05:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:05:27,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:05:27,635 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:05:27,638 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:05:29,057 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:05:30,262 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:05:30,262 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-25 00:05:30,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:30 BoogieIcfgContainer [2023-11-25 00:05:30,264 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:05:30,267 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:05:30,267 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:05:30,270 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:05:30,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:05:25" (1/3) ... [2023-11-25 00:05:30,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16acfd32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:30, skipping insertion in model container [2023-11-25 00:05:30,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:05:26" (2/3) ... [2023-11-25 00:05:30,272 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16acfd32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:05:30, skipping insertion in model container [2023-11-25 00:05:30,272 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:05:30" (3/3) ... [2023-11-25 00:05:30,274 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_FNV_nondet_test1-1.i [2023-11-25 00:05:30,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:05:30,297 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-25 00:05:30,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:05:30,364 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;@69bed6ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:05:30,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-25 00:05:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 65 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:05:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-25 00:05:30,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:30,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-25 00:05:30,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:05:30,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash 808630, now seen corresponding path program 1 times [2023-11-25 00:05:30,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:30,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527312370] [2023-11-25 00:05:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:30,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:30,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:30,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527312370] [2023-11-25 00:05:30,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527312370] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:30,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:30,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:05:30,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749237509] [2023-11-25 00:05:30,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:30,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:05:30,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:05:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:05:31,005 INFO L87 Difference]: Start difference. First operand has 70 states, 59 states have (on average 1.7457627118644068) internal successors, (103), 65 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:33,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:35,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:37,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:39,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:41,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:43,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:44,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-25 00:05:45,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:45,217 INFO L93 Difference]: Finished difference Result 148 states and 229 transitions. [2023-11-25 00:05:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:05:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-25 00:05:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:45,232 INFO L225 Difference]: With dead ends: 148 [2023-11-25 00:05:45,232 INFO L226 Difference]: Without dead ends: 78 [2023-11-25 00:05:45,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:05:45,254 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:45,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 114 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 14.1s Time] [2023-11-25 00:05:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-25 00:05:45,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-11-25 00:05:45,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 66 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:05:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-11-25 00:05:45,307 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 3 [2023-11-25 00:05:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:45,308 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-11-25 00:05:45,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-11-25 00:05:45,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:05:45,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:45,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:05:45,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:05:45,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:05:45,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash 25067589, now seen corresponding path program 1 times [2023-11-25 00:05:45,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:45,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273234613] [2023-11-25 00:05:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:45,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:45,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273234613] [2023-11-25 00:05:45,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273234613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:45,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:45,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:05:45,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755165848] [2023-11-25 00:05:45,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:45,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:05:45,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:05:45,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:05:45,553 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:47,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:49,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:51,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:53,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:55,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:57,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:05:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:05:58,706 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2023-11-25 00:05:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:05:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-25 00:05:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:05:58,714 INFO L225 Difference]: With dead ends: 78 [2023-11-25 00:05:58,714 INFO L226 Difference]: Without dead ends: 77 [2023-11-25 00:05:58,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:05:58,716 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:05:58,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 115 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2023-11-25 00:05:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-25 00:05:58,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2023-11-25 00:05:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:05:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2023-11-25 00:05:58,731 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 4 [2023-11-25 00:05:58,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:05:58,732 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2023-11-25 00:05:58,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:05:58,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2023-11-25 00:05:58,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:05:58,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:05:58,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:05:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:05:58,734 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:05:58,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:05:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 25229974, now seen corresponding path program 1 times [2023-11-25 00:05:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:05:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952320151] [2023-11-25 00:05:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:05:58,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:05:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:05:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:05:58,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:05:58,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952320151] [2023-11-25 00:05:58,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952320151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:05:58,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:05:58,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:05:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858449161] [2023-11-25 00:05:58,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:05:58,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:05:58,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:05:58,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:05:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:05:58,768 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:00,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:02,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:04,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:06,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:08,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:10,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:12,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-25 00:06:13,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-25 00:06:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:13,787 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2023-11-25 00:06:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-25 00:06:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:13,795 INFO L225 Difference]: With dead ends: 132 [2023-11-25 00:06:13,795 INFO L226 Difference]: Without dead ends: 127 [2023-11-25 00:06:13,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:13,797 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 59 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:13,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 123 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 6 Unknown, 0 Unchecked, 15.0s Time] [2023-11-25 00:06:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-25 00:06:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 72. [2023-11-25 00:06:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 67 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:06:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2023-11-25 00:06:13,811 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 4 [2023-11-25 00:06:13,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:13,811 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2023-11-25 00:06:13,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2023-11-25 00:06:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-25 00:06:13,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:13,813 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-11-25 00:06:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:06:13,814 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:06:13,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash 483132047, now seen corresponding path program 1 times [2023-11-25 00:06:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:13,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303610558] [2023-11-25 00:06:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:06:14,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:14,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303610558] [2023-11-25 00:06:14,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303610558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:14,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:14,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:06:14,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326141342] [2023-11-25 00:06:14,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:14,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-25 00:06:14,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:14,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-25 00:06:14,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:14,131 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:16,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:18,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:20,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:22,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:24,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:26,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:27,874 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2023-11-25 00:06:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-25 00:06:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-25 00:06:27,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:27,884 INFO L225 Difference]: With dead ends: 154 [2023-11-25 00:06:27,884 INFO L226 Difference]: Without dead ends: 86 [2023-11-25 00:06:27,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-25 00:06:27,886 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 11 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:27,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 6 Unknown, 0 Unchecked, 13.7s Time] [2023-11-25 00:06:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-25 00:06:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-25 00:06:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 81 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:06:27,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-11-25 00:06:27,916 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 31 [2023-11-25 00:06:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:27,916 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-11-25 00:06:27,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:06:27,917 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-11-25 00:06:27,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-25 00:06:27,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:27,919 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:06:27,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:06:27,919 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-25 00:06:27,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1104215000, now seen corresponding path program 1 times [2023-11-25 00:06:27,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:27,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214326764] [2023-11-25 00:06:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:27,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-25 00:06:28,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:28,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214326764] [2023-11-25 00:06:28,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214326764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:28,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:28,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-25 00:06:28,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262849617] [2023-11-25 00:06:28,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:28,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:06:28,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:06:28,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-25 00:06:28,272 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 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) [2023-11-25 00:06:30,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-25 00:06:32,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []