./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/poly2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/poly2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:46:17,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:17,118 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:46:17,131 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:17,132 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:17,174 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:17,175 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:17,175 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:17,177 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:17,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:17,182 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:17,183 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:17,184 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:17,185 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:17,186 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:17,186 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:17,187 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:17,187 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:17,187 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:17,188 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:17,188 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:17,189 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:17,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:17,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:17,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:46:17,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:17,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:46:17,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:17,193 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:17,193 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:17,194 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:17,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:46:17,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:17,195 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:17,195 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:17,196 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:17,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:17,196 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:17,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:17,197 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:17,197 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:17,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:17,198 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:17,198 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:17,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:17,199 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_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d98e92b0e397ee2afc9955ae7b4baaedb8be19fb7d6475412e7373cae81d62ab [2023-11-12 00:46:17,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:17,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:17,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:17,593 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:17,593 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:17,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/array-tiling/poly2.c [2023-11-12 00:46:20,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:20,969 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:20,970 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/sv-benchmarks/c/array-tiling/poly2.c [2023-11-12 00:46:20,978 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/data/2cd0b85f8/66ae9375736b42eaa42e465f4932b222/FLAG2e7a9c858 [2023-11-12 00:46:20,997 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/data/2cd0b85f8/66ae9375736b42eaa42e465f4932b222 [2023-11-12 00:46:21,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:21,009 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:21,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:21,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:21,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:21,019 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:20" (1/1) ... [2023-11-12 00:46:21,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c58a027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21, skipping insertion in model container [2023-11-12 00:46:21,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:20" (1/1) ... [2023-11-12 00:46:21,046 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:21,246 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/sv-benchmarks/c/array-tiling/poly2.c[396,409] [2023-11-12 00:46:21,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:21,293 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:21,312 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/sv-benchmarks/c/array-tiling/poly2.c[396,409] [2023-11-12 00:46:21,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:21,347 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:21,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21 WrapperNode [2023-11-12 00:46:21,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:21,350 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:21,350 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:21,350 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:21,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,397 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-11-12 00:46:21,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:21,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:21,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:21,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:21,409 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,410 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,412 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,412 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,418 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,427 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:21,428 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:21,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:21,428 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:21,429 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (1/1) ... [2023-11-12 00:46:21,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:21,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:21,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:21,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:46:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:21,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:21,600 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:21,602 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:21,786 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:21,826 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:21,826 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-12 00:46:21,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:21 BoogieIcfgContainer [2023-11-12 00:46:21,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:21,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:21,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:21,836 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:21,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:20" (1/3) ... [2023-11-12 00:46:21,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a22c296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:21, skipping insertion in model container [2023-11-12 00:46:21,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:21" (2/3) ... [2023-11-12 00:46:21,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a22c296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:21, skipping insertion in model container [2023-11-12 00:46:21,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:21" (3/3) ... [2023-11-12 00:46:21,839 INFO L112 eAbstractionObserver]: Analyzing ICFG poly2.c [2023-11-12 00:46:21,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:21,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:21,914 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:21,921 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;@5dd70c31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:21,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:21,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:46:21,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:21,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:21,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:21,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2117776725, now seen corresponding path program 1 times [2023-11-12 00:46:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:21,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336159526] [2023-11-12 00:46:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:21,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:22,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:22,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336159526] [2023-11-12 00:46:22,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 00:46:22,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428109804] [2023-11-12 00:46:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:22,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:22,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:22,121 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:22,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:46:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:22,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:46:22,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:22,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:46:22,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428109804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:22,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:22,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:46:22,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135738241] [2023-11-12 00:46:22,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:22,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:22,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:22,393 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:22,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:22,449 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2023-11-12 00:46:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:46:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:46:22,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:22,460 INFO L225 Difference]: With dead ends: 20 [2023-11-12 00:46:22,461 INFO L226 Difference]: Without dead ends: 10 [2023-11-12 00:46:22,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:22,467 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:22,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-12 00:46:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-12 00:46:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-12 00:46:22,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2023-11-12 00:46:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:22,504 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-12 00:46:22,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-12 00:46:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:46:22,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:22,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:22,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:22,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:22,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:22,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:22,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1452834579, now seen corresponding path program 1 times [2023-11-12 00:46:22,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:22,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654998235] [2023-11-12 00:46:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:22,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:22,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:22,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875075085] [2023-11-12 00:46:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:22,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:22,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:22,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:46:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:22,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:46:22,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:22,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:22,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654998235] [2023-11-12 00:46:22,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875075085] [2023-11-12 00:46:22,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875075085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:22,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075976486] [2023-11-12 00:46:22,974 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:46:22,974 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:22,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:22,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:22,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:23,648 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:23,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1075976486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:23,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:23,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-11-12 00:46:23,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559985856] [2023-11-12 00:46:23,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:23,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:46:23,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:46:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:46:23,844 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-11-12 00:46:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:24,058 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-12 00:46:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:46:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:46:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:24,060 INFO L225 Difference]: With dead ends: 21 [2023-11-12 00:46:24,060 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 00:46:24,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:46:24,062 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:24,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 00:46:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2023-11-12 00:46:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-12 00:46:24,071 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2023-11-12 00:46:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:24,071 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-12 00:46:24,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2023-11-12 00:46:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-12 00:46:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:46:24,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:24,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:24,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:24,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:24,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:24,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2089125409, now seen corresponding path program 1 times [2023-11-12 00:46:24,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:24,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527385955] [2023-11-12 00:46:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:24,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:24,301 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:24,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414566565] [2023-11-12 00:46:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:24,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:24,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:24,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:46:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:24,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:46:24,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:46:24,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:46:24,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527385955] [2023-11-12 00:46:24,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414566565] [2023-11-12 00:46:24,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414566565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [939486423] [2023-11-12 00:46:24,422 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:46:24,422 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:24,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:24,423 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:24,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:24,952 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:25,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '226#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| 0)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:46:25,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:25,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-11-12 00:46:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322924529] [2023-11-12 00:46:25,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:25,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:46:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:25,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:46:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:46:25,206 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:25,256 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2023-11-12 00:46:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:46:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:46:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:25,258 INFO L225 Difference]: With dead ends: 19 [2023-11-12 00:46:25,258 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 00:46:25,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-12 00:46:25,266 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:25,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 00:46:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-12 00:46:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-12 00:46:25,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2023-11-12 00:46:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:25,278 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-12 00:46:25,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-12 00:46:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:46:25,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:25,279 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:25,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:25,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:25,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:25,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1265117089, now seen corresponding path program 2 times [2023-11-12 00:46:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20921183] [2023-11-12 00:46:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:25,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:25,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:25,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287402997] [2023-11-12 00:46:25,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:46:25,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:25,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:25,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:46:25,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 00:46:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:25,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:46:25,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:46:25,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:46:25,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20921183] [2023-11-12 00:46:25,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287402997] [2023-11-12 00:46:25,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287402997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:25,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [403557049] [2023-11-12 00:46:25,655 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:46:25,655 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:25,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:25,656 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:25,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:26,684 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:26,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '339#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| 0)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:46:26,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:26,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:26,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 00:46:26,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334966538] [2023-11-12 00:46:26,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:26,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:46:26,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:46:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:46:26,927 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:26,989 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-12 00:46:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:46:26,989 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 00:46:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:26,990 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:46:26,990 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:46:26,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:46:26,991 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:26,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 10 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:46:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:46:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2023-11-12 00:46:26,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:26,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-12 00:46:26,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-11-12 00:46:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:26,999 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-12 00:46:26,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-12 00:46:26,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:46:26,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:27,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:27,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:27,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:27,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:27,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:27,206 INFO L85 PathProgramCache]: Analyzing trace with hash 562997675, now seen corresponding path program 3 times [2023-11-12 00:46:27,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:27,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580521987] [2023-11-12 00:46:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:27,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:27,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:27,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674059849] [2023-11-12 00:46:27,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:46:27,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:27,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:27,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:46:27,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:46:27,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:27,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-12 00:46:27,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:27,398 INFO L351 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 [2023-11-12 00:46:27,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 00:46:27,466 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:27,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-11-12 00:46:27,497 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:27,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 14 [2023-11-12 00:46:27,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:27,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:28,142 INFO L351 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 52 treesize of output 48 [2023-11-12 00:46:28,169 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:28,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-12 00:46:28,271 INFO L322 Elim1Store]: treesize reduction 20, result has 54.5 percent of original size [2023-11-12 00:46:28,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 99 [2023-11-12 00:46:28,372 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:28,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 69 [2023-11-12 00:46:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:28,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:28,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580521987] [2023-11-12 00:46:28,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:28,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674059849] [2023-11-12 00:46:28,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674059849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:28,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697648016] [2023-11-12 00:46:28,493 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:46:28,494 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:28,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:28,494 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:28,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:29,416 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:29,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '482#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| 0)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:46:29,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:29,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:29,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-11-12 00:46:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058229808] [2023-11-12 00:46:29,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:29,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:46:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:46:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:46:29,774 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:30,940 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-11-12 00:46:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 00:46:30,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:46:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:30,941 INFO L225 Difference]: With dead ends: 47 [2023-11-12 00:46:30,941 INFO L226 Difference]: Without dead ends: 45 [2023-11-12 00:46:30,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:46:30,943 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:30,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:46:30,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-12 00:46:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2023-11-12 00:46:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 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) [2023-11-12 00:46:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-12 00:46:30,957 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2023-11-12 00:46:30,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:30,957 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-12 00:46:30,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-12 00:46:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:46:30,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:30,958 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:30,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-12 00:46:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:31,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:31,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2001251861, now seen corresponding path program 4 times [2023-11-12 00:46:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:31,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534999322] [2023-11-12 00:46:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:31,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:31,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572888742] [2023-11-12 00:46:31,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:46:31,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:31,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:31,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:46:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:31,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 00:46:31,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:31,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:31,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534999322] [2023-11-12 00:46:31,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:31,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572888742] [2023-11-12 00:46:31,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572888742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:31,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927593490] [2023-11-12 00:46:31,414 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:46:31,414 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:31,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:31,415 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:31,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:31,715 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:31,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '699#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| 0)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:46:31,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:31,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:31,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-11-12 00:46:31,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958488308] [2023-11-12 00:46:31,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:31,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 00:46:31,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:31,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 00:46:31,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:46:31,949 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:32,376 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-11-12 00:46:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 00:46:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 00:46:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:32,379 INFO L225 Difference]: With dead ends: 74 [2023-11-12 00:46:32,379 INFO L226 Difference]: Without dead ends: 67 [2023-11-12 00:46:32,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2023-11-12 00:46:32,381 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:32,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 118 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:46:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-12 00:46:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 27. [2023-11-12 00:46:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2023-11-12 00:46:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-12 00:46:32,396 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 13 [2023-11-12 00:46:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:32,397 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-12 00:46:32,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:46:32,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-12 00:46:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:46:32,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:32,398 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:32,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:32,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:32,603 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:32,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1866232531, now seen corresponding path program 5 times [2023-11-12 00:46:32,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:32,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885685561] [2023-11-12 00:46:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:32,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:32,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:32,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069452130] [2023-11-12 00:46:32,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:46:32,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:32,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:32,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:32,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:46:32,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:46:32,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:32,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 00:46:32,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:32,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:32,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885685561] [2023-11-12 00:46:32,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069452130] [2023-11-12 00:46:32,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069452130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:32,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648994491] [2023-11-12 00:46:32,913 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:46:32,913 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:32,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:32,914 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:32,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:33,275 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:33,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '975#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| 0)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:46:33,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:33,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:33,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2023-11-12 00:46:33,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215239662] [2023-11-12 00:46:33,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:33,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 00:46:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 00:46:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:46:33,576 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2023-11-12 00:46:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:33,860 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2023-11-12 00:46:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:46:33,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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 14 [2023-11-12 00:46:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:33,864 INFO L225 Difference]: With dead ends: 77 [2023-11-12 00:46:33,865 INFO L226 Difference]: Without dead ends: 63 [2023-11-12 00:46:33,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2023-11-12 00:46:33,866 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:33,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 53 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:46:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-12 00:46:33,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2023-11-12 00:46:33,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 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) [2023-11-12 00:46:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-12 00:46:33,886 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2023-11-12 00:46:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:33,886 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-12 00:46:33,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 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) [2023-11-12 00:46:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-12 00:46:33,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-12 00:46:33,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:33,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:33,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:34,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:34,093 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:34,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:34,093 INFO L85 PathProgramCache]: Analyzing trace with hash 421729072, now seen corresponding path program 1 times [2023-11-12 00:46:34,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:34,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423314224] [2023-11-12 00:46:34,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:34,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:34,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:34,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391718193] [2023-11-12 00:46:34,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:34,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:34,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:34,125 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:34,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:46:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:34,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-12 00:46:34,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:34,280 INFO L351 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 13 treesize of output 9 [2023-11-12 00:46:34,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-12 00:46:34,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-11-12 00:46:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:34,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:35,024 INFO L351 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 52 treesize of output 48 [2023-11-12 00:46:35,041 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:35,041 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-12 00:46:35,111 INFO L322 Elim1Store]: treesize reduction 22, result has 54.2 percent of original size [2023-11-12 00:46:35,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 57 [2023-11-12 00:46:35,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:35,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2023-11-12 00:46:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:35,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423314224] [2023-11-12 00:46:35,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391718193] [2023-11-12 00:46:35,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391718193] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853343321] [2023-11-12 00:46:35,268 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 00:46:35,269 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:35,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:35,269 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:35,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:35,850 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:36,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1261#(and (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|))' at error location [2023-11-12 00:46:36,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:36,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:36,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-12 00:46:36,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937845670] [2023-11-12 00:46:36,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:36,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 00:46:36,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:36,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 00:46:36,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-11-12 00:46:36,285 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2023-11-12 00:46:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:38,184 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2023-11-12 00:46:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 00:46:38,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 14 [2023-11-12 00:46:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:38,185 INFO L225 Difference]: With dead ends: 51 [2023-11-12 00:46:38,185 INFO L226 Difference]: Without dead ends: 41 [2023-11-12 00:46:38,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=263, Invalid=1717, Unknown=0, NotChecked=0, Total=1980 [2023-11-12 00:46:38,187 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:38,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 71 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:46:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-12 00:46:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2023-11-12 00:46:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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) [2023-11-12 00:46:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-12 00:46:38,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 14 [2023-11-12 00:46:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:38,206 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-12 00:46:38,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2023-11-12 00:46:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-12 00:46:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:46:38,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:38,207 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:38,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:38,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:38,420 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:38,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:38,420 INFO L85 PathProgramCache]: Analyzing trace with hash 912664747, now seen corresponding path program 6 times [2023-11-12 00:46:38,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:38,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658888267] [2023-11-12 00:46:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:38,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:38,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:38,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086889286] [2023-11-12 00:46:38,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:46:38,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:38,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:38,436 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:38,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:46:38,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:46:38,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:46:38,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-12 00:46:38,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:38,672 INFO L351 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 [2023-11-12 00:46:38,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 00:46:38,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:38,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 00:46:38,747 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:38,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 00:46:38,837 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:38,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 47 [2023-11-12 00:46:38,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2023-11-12 00:46:38,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2023-11-12 00:46:39,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:39,033 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 38 [2023-11-12 00:46:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:39,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:46:44,497 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse21 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse24 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (let ((.cse15 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse22 (* 8 .cse24)) (.cse23 (* .cse21 8))) (let ((.cse10 (< 2147483647 .cse21)) (.cse1 (+ .cse23 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ .cse22 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (< 2147483647 .cse24)) (.cse9 (< .cse24 2147483648)) (.cse12 (+ .cse23 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse8 (+ .cse22 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse13 (< .cse21 2147483648)) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse14 (* .cse15 8))) (and (or (let ((.cse5 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (select .cse4 .cse5))) (and (or (and (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse0 (store .cse4 .cse5 v_ArrVal_195))) (or (< (select .cse0 .cse1) (+ v_ArrVal_196 2)) (= (select (store (store .cse0 .cse1 v_ArrVal_196) .cse2 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse3 (+ v_ArrVal_195 2))))) .cse6) (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse7 (store .cse4 .cse5 v_ArrVal_195))) (or (< (select .cse7 .cse1) (+ v_ArrVal_196 2)) (= (select (store (store .cse7 .cse1 v_ArrVal_196) .cse8 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse3 (+ v_ArrVal_195 2))))) .cse9)) .cse10) (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse11 (store .cse4 .cse5 v_ArrVal_195))) (or (= (select (store (store .cse11 .cse12 v_ArrVal_196) .cse8 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse11 .cse12) (+ v_ArrVal_196 2)) (< .cse3 (+ v_ArrVal_195 2))))) .cse13)))) (< 2147483647 .cse15)) (or (let ((.cse18 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (let ((.cse16 (select .cse4 .cse18))) (and (or .cse10 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse17 (store .cse4 .cse18 v_ArrVal_195))) (or (< .cse16 (+ v_ArrVal_195 2)) (= (select (store (store .cse17 .cse1 v_ArrVal_196) .cse2 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse17 .cse1) (+ v_ArrVal_196 2)))))) (or (and (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse19 (store .cse4 .cse18 v_ArrVal_195))) (or (= (select (store (store .cse19 .cse12 v_ArrVal_196) .cse2 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse19 .cse12) (+ v_ArrVal_196 2)) (< .cse16 (+ v_ArrVal_195 2))))) .cse6) (or .cse9 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse20 (store .cse4 .cse18 v_ArrVal_195))) (or (< (select .cse20 .cse12) (+ v_ArrVal_196 2)) (< .cse16 (+ v_ArrVal_195 2)) (= (select (store (store .cse20 .cse12 v_ArrVal_196) .cse8 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))))) .cse13)))) (< .cse15 2147483648)))))) is different from false [2023-11-12 00:46:47,684 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse34 (mod (+ 3 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse33 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse32 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) (let ((.cse0 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse29 (* .cse32 8)) (.cse31 (* 8 .cse33)) (.cse30 (* .cse34 8))) (let ((.cse15 (< 2147483647 .cse33)) (.cse13 (< .cse34 2147483648)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse30)) (.cse4 (+ .cse31 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse12 (< 2147483647 .cse34)) (.cse2 (< .cse33 2147483648)) (.cse16 (+ .cse29 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse18 (< .cse32 2147483648)) (.cse1 (< 2147483647 .cse32)) (.cse10 (+ .cse31 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse30)) (.cse8 (+ .cse29 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse19 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse21 (* .cse0 8))) (and (or (< 2147483647 .cse0) (let ((.cse7 (let ((.cse20 (+ .cse21 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse19 .cse20 (+ (- 2) (select .cse19 .cse20)))))) (and (or .cse1 (let ((.cse6 (select .cse7 .cse8))) (and (or .cse2 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse3 (store .cse7 .cse8 v_ArrVal_195))) (or (= (select (store (store .cse3 .cse4 v_ArrVal_196) .cse5 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse6 (+ v_ArrVal_195 2)) (< (select .cse3 .cse4) (+ v_ArrVal_196 2)))))) (or (and (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse9 (store .cse7 .cse8 v_ArrVal_195))) (or (< .cse6 (+ v_ArrVal_195 2)) (< (select .cse9 .cse10) (+ v_ArrVal_196 2)) (= (select (store (store .cse9 .cse10 v_ArrVal_196) .cse11 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse12) (or .cse13 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse14 (store .cse7 .cse8 v_ArrVal_195))) (or (< .cse6 (+ v_ArrVal_195 2)) (< (select .cse14 .cse10) (+ v_ArrVal_196 2)) (= (select (store (store .cse14 .cse10 v_ArrVal_196) .cse5 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))))) .cse15)))) (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse17 (store .cse7 .cse16 v_ArrVal_195))) (or (< (select .cse7 .cse16) (+ v_ArrVal_195 2)) (< (select .cse17 .cse4) (+ v_ArrVal_196 2)) (= (select (store (store .cse17 .cse4 v_ArrVal_196) .cse5 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse18)))) (or (let ((.cse24 (let ((.cse28 (+ .cse21 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)))) (store .cse19 .cse28 (+ (- 2) (select .cse19 .cse28)))))) (and (or (let ((.cse22 (select .cse24 .cse16))) (and (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse23 (store .cse24 .cse16 v_ArrVal_195))) (or (< .cse22 (+ v_ArrVal_195 2)) (= (select (store (store .cse23 .cse10 v_ArrVal_196) .cse11 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse23 .cse10) (+ v_ArrVal_196 2))))) .cse15) (or (and (or .cse13 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse25 (store .cse24 .cse16 v_ArrVal_195))) (or (< .cse22 (+ v_ArrVal_195 2)) (= (select (store (store .cse25 .cse4 v_ArrVal_196) .cse5 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse25 .cse4) (+ v_ArrVal_196 2)))))) (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse26 (store .cse24 .cse16 v_ArrVal_195))) (or (< .cse22 (+ v_ArrVal_195 2)) (< (select .cse26 .cse4) (+ v_ArrVal_196 2)) (= (select (store (store .cse26 .cse4 v_ArrVal_196) .cse11 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))) .cse12)) .cse2))) .cse18) (or .cse1 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse27 (store .cse24 .cse8 v_ArrVal_195))) (or (< (select .cse27 .cse10) (+ v_ArrVal_196 2)) (< (select .cse24 .cse8) (+ v_ArrVal_195 2)) (= (select (store (store .cse27 .cse10 v_ArrVal_196) .cse11 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))))))) (< .cse0 2147483648)))))) is different from false [2023-11-12 00:46:48,410 INFO L351 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 52 treesize of output 48 [2023-11-12 00:46:48,645 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:48,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-12 00:46:48,769 INFO L322 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-12 00:46:48,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 546 treesize of output 506 [2023-11-12 00:46:48,832 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:48,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 436 treesize of output 434 [2023-11-12 00:46:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-12 00:46:49,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:49,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658888267] [2023-11-12 00:46:49,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:46:49,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086889286] [2023-11-12 00:46:49,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086889286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:46:49,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433330290] [2023-11-12 00:46:49,440 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:46:49,440 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:46:49,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:46:49,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:46:49,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:46:50,081 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:46:50,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1535#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| 0)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:46:50,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:46:50,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:46:50,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-11-12 00:46:50,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943075741] [2023-11-12 00:46:50,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:46:50,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:46:50,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:50,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:46:50,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=689, Unknown=3, NotChecked=110, Total=930 [2023-11-12 00:46:50,573 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2023-11-12 00:46:53,966 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse21 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse22 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse25 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse26 (* .cse21 8))) (let ((.cse15 (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse23 (* 8 .cse25)) (.cse24 (* .cse22 8)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (+ .cse26 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (< 2147483647 .cse21)) (.cse6 (select .cse1 .cse2)) (.cse11 (< 2147483647 .cse22)) (.cse4 (+ .cse24 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ .cse23 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (< 2147483647 .cse25)) (.cse10 (< .cse25 2147483648)) (.cse16 (select .cse1 .cse15)) (.cse13 (+ .cse24 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse9 (+ .cse23 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse14 (< .cse22 2147483648)) (.cse17 (< .cse21 2147483648))) (and (or .cse0 (forall ((v_DerPreprocessor_6 Int)) (= (select (store .cse1 .cse2 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))) (or (and (or (and (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse3 (store .cse1 .cse2 v_ArrVal_195))) (or (< (select .cse3 .cse4) (+ v_ArrVal_196 2)) (= (select (store (store .cse3 .cse4 v_ArrVal_196) .cse5 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse6 (+ v_ArrVal_195 2))))) .cse7) (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse8 (store .cse1 .cse2 v_ArrVal_195))) (or (< (select .cse8 .cse4) (+ v_ArrVal_196 2)) (= (select (store (store .cse8 .cse4 v_ArrVal_196) .cse9 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse6 (+ v_ArrVal_195 2))))) .cse10)) .cse11) (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse12 (store .cse1 .cse2 v_ArrVal_195))) (or (= (select (store (store .cse12 .cse13 v_ArrVal_196) .cse9 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse12 .cse13) (+ v_ArrVal_196 2)) (< .cse6 (+ v_ArrVal_195 2))))) .cse14)) .cse0) (or (and (or (forall ((v_ArrVal_196 Int) (v_DerPreprocessor_5 Int)) (or (= (select (store (store .cse1 .cse15 v_ArrVal_196) .cse13 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse16 (+ v_ArrVal_196 2)))) .cse14) (or .cse11 (forall ((v_ArrVal_196 Int) (v_DerPreprocessor_6 Int)) (or (= (select (store (store .cse1 .cse15 v_ArrVal_196) .cse4 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse16 (+ v_ArrVal_196 2)))))) .cse17) (or .cse0 (and (or (forall ((v_ArrVal_196 Int) (v_DerPreprocessor_5 Int)) (or (= (select (store (store .cse1 .cse2 v_ArrVal_196) .cse13 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse6 (+ v_ArrVal_196 2)))) .cse14) (or .cse11 (forall ((v_ArrVal_196 Int) (v_DerPreprocessor_6 Int)) (or (= (select (store (store .cse1 .cse2 v_ArrVal_196) .cse4 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< .cse6 (+ v_ArrVal_196 2))))))) (or (and (or .cse11 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse18 (store .cse1 .cse15 v_ArrVal_195))) (or (< .cse16 (+ v_ArrVal_195 2)) (= (select (store (store .cse18 .cse4 v_ArrVal_196) .cse5 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse18 .cse4) (+ v_ArrVal_196 2)))))) (or (and (or (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_6 Int)) (let ((.cse19 (store .cse1 .cse15 v_ArrVal_195))) (or (= (select (store (store .cse19 .cse13 v_ArrVal_196) .cse5 v_DerPreprocessor_6) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (< (select .cse19 .cse13) (+ v_ArrVal_196 2)) (< .cse16 (+ v_ArrVal_195 2))))) .cse7) (or .cse10 (forall ((v_ArrVal_196 Int) (v_ArrVal_195 Int) (v_DerPreprocessor_5 Int)) (let ((.cse20 (store .cse1 .cse15 v_ArrVal_195))) (or (< (select .cse20 .cse13) (+ v_ArrVal_196 2)) (< .cse16 (+ v_ArrVal_195 2)) (= (select (store (store .cse20 .cse13 v_ArrVal_196) .cse9 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)))))) .cse14)) .cse17) (or (forall ((v_DerPreprocessor_5 Int)) (= (select (store .cse1 .cse15 v_DerPreprocessor_5) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) .cse17)))))) is different from false [2023-11-12 00:46:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:56,921 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2023-11-12 00:46:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-12 00:46:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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 15 [2023-11-12 00:46:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:56,923 INFO L225 Difference]: With dead ends: 88 [2023-11-12 00:46:56,923 INFO L226 Difference]: Without dead ends: 86 [2023-11-12 00:46:56,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=286, Invalid=1702, Unknown=4, NotChecked=264, Total=2256 [2023-11-12 00:46:56,925 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 81 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:56,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 81 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 291 Invalid, 0 Unknown, 173 Unchecked, 2.1s Time] [2023-11-12 00:46:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-12 00:46:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 46. [2023-11-12 00:46:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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) [2023-11-12 00:46:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-11-12 00:46:56,957 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 15 [2023-11-12 00:46:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:56,958 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-11-12 00:46:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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) [2023-11-12 00:46:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-11-12 00:46:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:46:56,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:56,959 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:56,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:46:57,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:57,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:57,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1572503007, now seen corresponding path program 7 times [2023-11-12 00:46:57,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:57,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137079391] [2023-11-12 00:46:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:57,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:57,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:46:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962582947] [2023-11-12 00:46:57,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:46:57,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:46:57,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:57,175 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:46:57,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c55316b7-8ec6-4958-a9e3-04372064f083/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:46:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:57,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-12 00:46:57,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:46:57,539 INFO L351 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 [2023-11-12 00:46:57,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 00:46:57,576 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:57,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2023-11-12 00:46:57,610 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:57,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-12 00:46:57,649 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:57,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2023-11-12 00:46:57,739 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:57,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 59 [2023-11-12 00:46:57,815 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:57,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 50 [2023-11-12 00:46:57,895 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:57,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 38 [2023-11-12 00:46:57,970 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:57,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 26 [2023-11-12 00:46:58,018 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:46:58,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 14 [2023-11-12 00:46:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:58,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:47:04,528 INFO L351 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 52 treesize of output 48 [2023-11-12 00:47:04,714 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:04,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 95 [2023-11-12 00:47:04,985 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:47:04,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114852 treesize of output 114590 [2023-11-12 00:47:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:06,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137079391] [2023-11-12 00:47:06,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:47:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962582947] [2023-11-12 00:47:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962582947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:47:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892657186] [2023-11-12 00:47:06,423 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:47:06,423 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:47:06,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:47:06,424 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:47:06,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:47:07,036 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:47:07,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1913#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem10#1| 0)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:47:07,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:47:07,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:47:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2023-11-12 00:47:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168947445] [2023-11-12 00:47:07,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 00:47:07,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-12 00:47:07,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-12 00:47:07,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:47:07,702 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 29 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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) [2023-11-12 00:47:15,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]