./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ --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 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:05:05,541 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:05:05,610 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 05:05:05,617 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:05:05,617 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:05:05,647 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:05:05,648 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:05:05,649 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:05:05,650 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:05:05,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:05:05,651 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:05:05,652 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:05:05,652 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:05:05,653 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:05:05,654 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:05:05,654 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:05:05,655 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:05:05,656 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:05:05,656 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:05:05,657 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:05:05,658 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:05:05,659 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:05:05,660 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:05:05,660 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:05:05,661 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:05:05,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:05:05,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:05:05,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:05:05,664 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:05:05,664 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:05:05,665 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:05:05,665 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 05:05:05,666 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:05:05,666 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:05:05,667 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:05:05,667 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:05:05,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:05:05,668 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:05:05,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:05,669 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:05:05,669 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:05:05,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:05:05,670 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:05:05,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:05:05,671 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:05:05,671 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:05:05,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:05:05,672 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_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 [2023-11-19 05:05:05,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:05:05,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:05:05,961 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:05:05,962 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:05:05,963 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:05:05,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2023-11-19 05:05:08,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:05:09,465 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:05:09,466 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2023-11-19 05:05:09,494 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/data/801f6cd6a/9bf98c7de6ad4356a9578f3671db825c/FLAGb6c78b6c2 [2023-11-19 05:05:09,510 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/data/801f6cd6a/9bf98c7de6ad4356a9578f3671db825c [2023-11-19 05:05:09,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:05:09,522 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:05:09,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:09,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:05:09,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:05:09,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:09" (1/1) ... [2023-11-19 05:05:09,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c2b7075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:09, skipping insertion in model container [2023-11-19 05:05:09,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:09" (1/1) ... [2023-11-19 05:05:09,627 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:05:10,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:10,719 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:05:10,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:10,989 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:05:10,997 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:05:10,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10 WrapperNode [2023-11-19 05:05:10,998 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:10,999 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:11,000 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:05:11,000 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:05:11,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,185 INFO L138 Inliner]: procedures = 177, calls = 732, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3195 [2023-11-19 05:05:11,185 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:11,186 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:05:11,186 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:05:11,186 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:05:11,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,210 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,210 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,276 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,330 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:05:11,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:05:11,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:05:11,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:05:11,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (1/1) ... [2023-11-19 05:05:11,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:11,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:11,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:05:11,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:05:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-19 05:05:11,421 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-19 05:05:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:05:11,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:05:11,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:05:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:05:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-19 05:05:11,422 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-19 05:05:11,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:05:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:05:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:05:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:05:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-19 05:05:11,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:05:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:05:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:05:11,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:05:11,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:05:11,612 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:05:11,614 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:05:14,524 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:05:16,796 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:05:16,796 INFO L302 CfgBuilder]: Removed 54 assume(true) statements. [2023-11-19 05:05:16,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:16 BoogieIcfgContainer [2023-11-19 05:05:16,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:05:16,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:05:16,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:05:16,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:05:16,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:05:09" (1/3) ... [2023-11-19 05:05:16,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46876dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:16, skipping insertion in model container [2023-11-19 05:05:16,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:10" (2/3) ... [2023-11-19 05:05:16,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46876dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:16, skipping insertion in model container [2023-11-19 05:05:16,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:16" (3/3) ... [2023-11-19 05:05:16,834 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test9-1.i [2023-11-19 05:05:16,860 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:05:16,861 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-19 05:05:16,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:05:16,999 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;@5810258, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:05:16,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 05:05:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 1122 states, 605 states have (on average 1.9553719008264463) internal successors, (1183), 1115 states have internal predecessors, (1183), 505 states have call successors, (505), 3 states have call predecessors, (505), 3 states have return successors, (505), 6 states have call predecessors, (505), 505 states have call successors, (505) [2023-11-19 05:05:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 05:05:17,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:17,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 05:05:17,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-19 05:05:17,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash 161510809, now seen corresponding path program 1 times [2023-11-19 05:05:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:17,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130134686] [2023-11-19 05:05:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:17,231 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:05:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687943822] [2023-11-19 05:05:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:17,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:05:17,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:17,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:05:17,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:05:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:17,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 05:05:17,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:05:17,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:05:17,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 05:05:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:05:17,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-19 05:05:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:17,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:05:17,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130134686] [2023-11-19 05:05:17,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:05:17,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687943822] [2023-11-19 05:05:17,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687943822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:17,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:17,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:17,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588599083] [2023-11-19 05:05:17,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:17,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:05:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:05:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:05:17,725 INFO L87 Difference]: Start difference. First operand has 1122 states, 605 states have (on average 1.9553719008264463) internal successors, (1183), 1115 states have internal predecessors, (1183), 505 states have call successors, (505), 3 states have call predecessors, (505), 3 states have return successors, (505), 6 states have call predecessors, (505), 505 states have call successors, (505) 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) [2023-11-19 05:05:19,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:21,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:23,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:25,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:27,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:30,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:32,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:35,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:37,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:39,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:41,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:43,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:45,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:47,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:48,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:50,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:52,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:54,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:05:56,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:06:00,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-19 05:06:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:03,376 INFO L93 Difference]: Finished difference Result 4351 states and 10069 transitions. [2023-11-19 05:06:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 05:06:03,383 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 [2023-11-19 05:06:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:03,464 INFO L225 Difference]: With dead ends: 4351 [2023-11-19 05:06:03,464 INFO L226 Difference]: Without dead ends: 3213 [2023-11-19 05:06:03,492 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 [2023-11-19 05:06:03,503 INFO L413 NwaCegarLoop]: 2518 mSDtfsCounter, 3168 mSDsluCounter, 3957 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 772 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3668 SdHoareTripleChecker+Valid, 6475 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:03,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3668 Valid, 6475 Invalid, 1396 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [772 Valid, 607 Invalid, 17 Unknown, 0 Unchecked, 44.9s Time] [2023-11-19 05:06:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2023-11-19 05:06:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 1120. [2023-11-19 05:06:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 607 states have (on average 1.8599670510708401) internal successors, (1129), 1114 states have internal predecessors, (1129), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2023-11-19 05:06:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 2135 transitions. [2023-11-19 05:06:04,638 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 2135 transitions. Word has length 4 [2023-11-19 05:06:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:04,639 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 2135 transitions. [2023-11-19 05:06:04,639 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) [2023-11-19 05:06:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 2135 transitions. [2023-11-19 05:06:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:06:04,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:04,642 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] [2023-11-19 05:06:04,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:04,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39fa0e1b-cb24-48b5-b531-389a329492aa/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 05:06:04,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-11-19 05:06:04,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:04,858 INFO L85 PathProgramCache]: Analyzing trace with hash 491924619, now seen corresponding path program 1 times [2023-11-19 05:06:04,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:04,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304408494] [2023-11-19 05:06:04,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:04,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:05,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:05,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304408494] [2023-11-19 05:06:05,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304408494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:05,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:05,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:06:05,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275799311] [2023-11-19 05:06:05,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:05,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:06:05,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:06:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:06:05,640 INFO L87 Difference]: Start difference. First operand 1120 states and 2135 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:07,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-19 05:06:09,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []