./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/linear_sea.ch.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/linear_sea.ch.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ --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 eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:53:09,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:53:09,238 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:53:09,244 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:53:09,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:53:09,299 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:53:09,300 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:53:09,301 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:53:09,302 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:53:09,309 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:53:09,309 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:53:09,310 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:53:09,311 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:53:09,313 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:53:09,314 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:53:09,314 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:53:09,315 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:53:09,316 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:53:09,317 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:53:09,317 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:53:09,318 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:53:09,319 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:53:09,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:53:09,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:53:09,322 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:53:09,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:53:09,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:53:09,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:53:09,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:53:09,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:53:09,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:53:09,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:53:09,327 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:53:09,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:53:09,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:53:09,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:53:09,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:09,354 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:53:09,354 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:53:09,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:53:09,355 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:53:09,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:53:09,356 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:53:09,356 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:53:09,359 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:53:09,359 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_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 [2023-11-19 04:53:09,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:53:09,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:53:09,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:53:09,848 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:53:09,851 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:53:09,866 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/loops/linear_sea.ch.c [2023-11-19 04:53:13,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:53:13,782 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:53:13,783 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/sv-benchmarks/c/loops/linear_sea.ch.c [2023-11-19 04:53:13,793 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/data/19690e95c/f687af786d0840bdb69f14573ac9c6d1/FLAGc2ea96189 [2023-11-19 04:53:13,811 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/data/19690e95c/f687af786d0840bdb69f14573ac9c6d1 [2023-11-19 04:53:13,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:53:13,816 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:53:13,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:13,821 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:53:13,828 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:53:13,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:13" (1/1) ... [2023-11-19 04:53:13,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b6e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:13, skipping insertion in model container [2023-11-19 04:53:13,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:53:13" (1/1) ... [2023-11-19 04:53:13,889 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:53:14,090 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_a526f3e4-b3ae-4ede-8889-df89d7e8707b/sv-benchmarks/c/loops/linear_sea.ch.c[383,396] [2023-11-19 04:53:14,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:14,121 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:53:14,134 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_a526f3e4-b3ae-4ede-8889-df89d7e8707b/sv-benchmarks/c/loops/linear_sea.ch.c[383,396] [2023-11-19 04:53:14,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:53:14,158 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:53:14,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14 WrapperNode [2023-11-19 04:53:14,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:53:14,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:14,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:53:14,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:53:14,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,179 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,202 INFO L138 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-19 04:53:14,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:53:14,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:53:14,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:53:14,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:53:14,213 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,223 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,228 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:53:14,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:53:14,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:53:14,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:53:14,234 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (1/1) ... [2023-11-19 04:53:14,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:53:14,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:14,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:53:14,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:53:14,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:53:14,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:53:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:53:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:53:14,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:53:14,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:53:14,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:53:14,484 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:53:14,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:53:14,694 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:53:14,792 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:53:14,793 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:53:14,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:14 BoogieIcfgContainer [2023-11-19 04:53:14,798 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:53:14,805 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:53:14,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:53:14,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:53:14,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:53:13" (1/3) ... [2023-11-19 04:53:14,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60750806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:14, skipping insertion in model container [2023-11-19 04:53:14,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:53:14" (2/3) ... [2023-11-19 04:53:14,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60750806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:53:14, skipping insertion in model container [2023-11-19 04:53:14,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:53:14" (3/3) ... [2023-11-19 04:53:14,818 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2023-11-19 04:53:14,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:53:14,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:53:14,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:53:14,945 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;@4b59a4dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:53:14,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:53:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2023-11-19 04:53:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:53:14,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:14,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:53:14,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:14,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1928108671, now seen corresponding path program 1 times [2023-11-19 04:53:14,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:14,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527759407] [2023-11-19 04:53:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:15,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527759407] [2023-11-19 04:53:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527759407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:15,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:15,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:53:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052374922] [2023-11-19 04:53:15,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:15,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 04:53:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 04:53:15,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:53:15,217 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:15,284 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2023-11-19 04:53:15,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 04:53:15,287 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 04:53:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:15,299 INFO L225 Difference]: With dead ends: 18 [2023-11-19 04:53:15,300 INFO L226 Difference]: Without dead ends: 8 [2023-11-19 04:53:15,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 04:53:15,309 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:15,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:53:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-19 04:53:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-19 04:53:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2023-11-19 04:53:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-11-19 04:53:15,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2023-11-19 04:53:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:15,350 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-11-19 04:53:15,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-11-19 04:53:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:53:15,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:15,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:15,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:53:15,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:15,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:15,354 INFO L85 PathProgramCache]: Analyzing trace with hash 385836665, now seen corresponding path program 1 times [2023-11-19 04:53:15,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:15,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466913400] [2023-11-19 04:53:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:15,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:15,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466913400] [2023-11-19 04:53:15,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466913400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:53:15,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:53:15,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:53:15,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885450908] [2023-11-19 04:53:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:53:15,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:53:15,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:53:15,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:53:15,861 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:15,922 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-19 04:53:15,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:53:15,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 04:53:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:15,924 INFO L225 Difference]: With dead ends: 14 [2023-11-19 04:53:15,925 INFO L226 Difference]: Without dead ends: 10 [2023-11-19 04:53:15,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:53:15,928 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:15,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:53:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-19 04:53:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-19 04:53:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-19 04:53:15,935 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2023-11-19 04:53:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:15,936 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-19 04:53:15,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-19 04:53:15,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:53:15,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:15,938 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:53:15,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:15,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1480522618, now seen corresponding path program 1 times [2023-11-19 04:53:15,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:15,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916532291] [2023-11-19 04:53:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:15,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:16,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:16,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916532291] [2023-11-19 04:53:16,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916532291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:53:16,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322754010] [2023-11-19 04:53:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:16,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:16,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:16,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:16,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:53:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:16,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 04:53:16,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:16,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:17,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322754010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:17,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [735861901] [2023-11-19 04:53:17,043 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:53:17,048 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:17,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:17,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:17,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:53:19,044 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:53:21,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '133#(and (= |ULTIMATE.start_linear_search_#res#1| 0) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (exists ((|v_ULTIMATE.start_linear_search_#t~mem4#1_26| Int) (|v_ULTIMATE.start_linear_search_#t~short5#1_16| Bool) (|v_ULTIMATE.start_linear_search_~j~0#1_25| Int) (|v_ULTIMATE.start_linear_search_~n#1_13| Int) (|v_ULTIMATE.start_linear_search_~a#1.base_13| Int) (|v_ULTIMATE.start_linear_search_#t~mem4#1_27| Int)) (and (<= 0 |v_ULTIMATE.start_linear_search_~j~0#1_25|) (or (and (or (and (<= 2147483648 (mod |v_ULTIMATE.start_linear_search_~j~0#1_25| 4294967296)) (= (select (select |#memory_int| |v_ULTIMATE.start_linear_search_~a#1.base_13|) (+ (- 17179869184) (* (mod |v_ULTIMATE.start_linear_search_~j~0#1_25| 4294967296) 4))) 3)) (and (= 3 (select (select |#memory_int| |v_ULTIMATE.start_linear_search_~a#1.base_13|) (* (mod |v_ULTIMATE.start_linear_search_~j~0#1_25| 4294967296) 4))) (<= (mod |v_ULTIMATE.start_linear_search_~j~0#1_25| 4294967296) 2147483647))) |v_ULTIMATE.start_linear_search_#t~short5#1_16| (= 3 |v_ULTIMATE.start_linear_search_#t~mem4#1_27|)) (and (not |v_ULTIMATE.start_linear_search_#t~short5#1_16|) (= |v_ULTIMATE.start_linear_search_#t~mem4#1_27| |v_ULTIMATE.start_linear_search_#t~mem4#1_26|))) (<= (mod ~SIZE~0 4294967296) (mod |v_ULTIMATE.start_linear_search_~j~0#1_25| 4294967296)) (or (and (not |v_ULTIMATE.start_linear_search_#t~short5#1_16|) (<= (mod |v_ULTIMATE.start_linear_search_~n#1_13| 4294967296) (mod |v_ULTIMATE.start_linear_search_~j~0#1_25| 4294967296))) (and (<= (+ (mod |v_ULTIMATE.start_linear_search_~j~0#1_25| 4294967296) 1) (mod |v_ULTIMATE.start_linear_search_~n#1_13| 4294967296)) |v_ULTIMATE.start_linear_search_#t~short5#1_16|)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~ret9#1| 0))' at error location [2023-11-19 04:53:21,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:53:21,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:53:21,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-19 04:53:21,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633225161] [2023-11-19 04:53:21,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:53:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:53:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:53:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2023-11-19 04:53:21,840 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2023-11-19 04:53:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:21,910 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2023-11-19 04:53:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:53:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 9 [2023-11-19 04:53:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:21,912 INFO L225 Difference]: With dead ends: 16 [2023-11-19 04:53:21,913 INFO L226 Difference]: Without dead ends: 12 [2023-11-19 04:53:21,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=36, Invalid=173, Unknown=1, NotChecked=0, Total=210 [2023-11-19 04:53:21,920 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:21,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:53:21,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-19 04:53:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-19 04:53:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2023-11-19 04:53:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-11-19 04:53:21,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2023-11-19 04:53:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:21,932 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-11-19 04:53:21,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2023-11-19 04:53:21,937 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-11-19 04:53:21,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:53:21,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:21,939 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:21,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:22,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:22,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:22,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1206735931, now seen corresponding path program 2 times [2023-11-19 04:53:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626033903] [2023-11-19 04:53:22,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:25,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626033903] [2023-11-19 04:53:25,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626033903] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:53:25,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117046458] [2023-11-19 04:53:25,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:53:25,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:25,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:25,728 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:25,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:53:25,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:53:25,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:53:25,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-19 04:53:25,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:26,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:53:26,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-11-19 04:53:26,571 INFO L349 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2023-11-19 04:53:26,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 59 treesize of output 59 [2023-11-19 04:53:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:26,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:27,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117046458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596982171] [2023-11-19 04:53:27,759 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:53:27,760 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:27,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:27,761 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:27,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:53:28,561 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:53:31,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '254#(and (= |ULTIMATE.start_linear_search_#res#1| 0) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (exists ((|v_ULTIMATE.start_linear_search_#t~mem4#1_45| Int) (|v_ULTIMATE.start_linear_search_#t~short5#1_16| Bool) (|v_ULTIMATE.start_linear_search_~n#1_16| Int) (|v_ULTIMATE.start_linear_search_#t~mem4#1_44| Int) (|v_ULTIMATE.start_linear_search_~j~0#1_35| Int) (|v_ULTIMATE.start_linear_search_~a#1.base_16| Int)) (and (<= (mod ~SIZE~0 4294967296) (mod |v_ULTIMATE.start_linear_search_~j~0#1_35| 4294967296)) (<= 0 |v_ULTIMATE.start_linear_search_~j~0#1_35|) (or (and |v_ULTIMATE.start_linear_search_#t~short5#1_16| (<= (+ (mod |v_ULTIMATE.start_linear_search_~j~0#1_35| 4294967296) 1) (mod |v_ULTIMATE.start_linear_search_~n#1_16| 4294967296))) (and (not |v_ULTIMATE.start_linear_search_#t~short5#1_16|) (<= (mod |v_ULTIMATE.start_linear_search_~n#1_16| 4294967296) (mod |v_ULTIMATE.start_linear_search_~j~0#1_35| 4294967296)))) (or (and (not |v_ULTIMATE.start_linear_search_#t~short5#1_16|) (= |v_ULTIMATE.start_linear_search_#t~mem4#1_45| |v_ULTIMATE.start_linear_search_#t~mem4#1_44|)) (and (= 3 |v_ULTIMATE.start_linear_search_#t~mem4#1_45|) (or (and (<= 2147483648 (mod |v_ULTIMATE.start_linear_search_~j~0#1_35| 4294967296)) (= (select (select |#memory_int| |v_ULTIMATE.start_linear_search_~a#1.base_16|) (+ (- 17179869184) (* (mod |v_ULTIMATE.start_linear_search_~j~0#1_35| 4294967296) 4))) 3)) (and (<= (mod |v_ULTIMATE.start_linear_search_~j~0#1_35| 4294967296) 2147483647) (= (select (select |#memory_int| |v_ULTIMATE.start_linear_search_~a#1.base_16|) (* (mod |v_ULTIMATE.start_linear_search_~j~0#1_35| 4294967296) 4)) 3))) |v_ULTIMATE.start_linear_search_#t~short5#1_16|)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~ret9#1| 0))' at error location [2023-11-19 04:53:31,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:53:31,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:53:31,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-19 04:53:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118842688] [2023-11-19 04:53:31,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:53:31,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 04:53:31,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:31,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 04:53:31,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=606, Unknown=1, NotChecked=0, Total=702 [2023-11-19 04:53:31,615 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:33,381 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2023-11-19 04:53:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:53:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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 [2023-11-19 04:53:33,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:33,384 INFO L225 Difference]: With dead ends: 24 [2023-11-19 04:53:33,384 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 04:53:33,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=242, Invalid=1163, Unknown=1, NotChecked=0, Total=1406 [2023-11-19 04:53:33,392 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 61 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:33,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 32 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:53:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 04:53:33,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 04:53:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2023-11-19 04:53:33,409 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2023-11-19 04:53:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:33,410 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2023-11-19 04:53:33,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2023-11-19 04:53:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:53:33,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:33,412 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:33,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:53:33,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:33,624 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:33,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:33,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1273599230, now seen corresponding path program 3 times [2023-11-19 04:53:33,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:33,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023022216] [2023-11-19 04:53:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:53:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:41,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:53:41,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023022216] [2023-11-19 04:53:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023022216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:53:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297091869] [2023-11-19 04:53:41,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:53:41,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:53:41,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:53:41,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:53:41,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:53:41,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:53:41,411 WARN L260 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-19 04:53:41,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:53:41,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 04:53:43,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2023-11-19 04:53:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:43,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:53:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:53:46,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297091869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:53:46,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872333697] [2023-11-19 04:53:46,038 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:53:46,038 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:53:46,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:53:46,039 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:53:46,039 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:53:46,619 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:53:47,738 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (= |ULTIMATE.start_linear_search_#res#1| 0) (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_linear_search_~j~0#1_51| Int) (|v_ULTIMATE.start_linear_search_#t~short5#1_16| Bool) (|v_ULTIMATE.start_linear_search_~n#1_19| Int) (|v_ULTIMATE.start_linear_search_#t~mem4#1_71| Int) (|v_ULTIMATE.start_linear_search_#t~mem4#1_70| Int) (|v_ULTIMATE.start_linear_search_~a#1.base_19| Int)) (and (<= (mod ~SIZE~0 4294967296) (mod |v_ULTIMATE.start_linear_search_~j~0#1_51| 4294967296)) (or (and (not |v_ULTIMATE.start_linear_search_#t~short5#1_16|) (= |v_ULTIMATE.start_linear_search_#t~mem4#1_71| |v_ULTIMATE.start_linear_search_#t~mem4#1_70|)) (and (or (and (= (select (select |#memory_int| |v_ULTIMATE.start_linear_search_~a#1.base_19|) (+ (* (mod |v_ULTIMATE.start_linear_search_~j~0#1_51| 4294967296) 4) (- 17179869184))) 3) (<= 2147483648 (mod |v_ULTIMATE.start_linear_search_~j~0#1_51| 4294967296))) (and (= (select (select |#memory_int| |v_ULTIMATE.start_linear_search_~a#1.base_19|) (* (mod |v_ULTIMATE.start_linear_search_~j~0#1_51| 4294967296) 4)) 3) (<= (mod |v_ULTIMATE.start_linear_search_~j~0#1_51| 4294967296) 2147483647))) |v_ULTIMATE.start_linear_search_#t~short5#1_16| (= 3 |v_ULTIMATE.start_linear_search_#t~mem4#1_71|))) (<= 0 |v_ULTIMATE.start_linear_search_~j~0#1_51|) (or (and (not |v_ULTIMATE.start_linear_search_#t~short5#1_16|) (<= (mod |v_ULTIMATE.start_linear_search_~n#1_19| 4294967296) (mod |v_ULTIMATE.start_linear_search_~j~0#1_51| 4294967296))) (and (<= (+ (mod |v_ULTIMATE.start_linear_search_~j~0#1_51| 4294967296) 1) (mod |v_ULTIMATE.start_linear_search_~n#1_19| 4294967296)) |v_ULTIMATE.start_linear_search_#t~short5#1_16|)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_#t~ret9#1| 0))' at error location [2023-11-19 04:53:47,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:53:47,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:53:47,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-11-19 04:53:47,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981037369] [2023-11-19 04:53:47,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:53:47,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-19 04:53:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:53:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-19 04:53:47,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2023-11-19 04:53:47,743 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:59,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:53:59,035 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-19 04:53:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-19 04:53:59,036 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 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 17 [2023-11-19 04:53:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:53:59,037 INFO L225 Difference]: With dead ends: 42 [2023-11-19 04:53:59,037 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 04:53:59,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=883, Invalid=4969, Unknown=0, NotChecked=0, Total=5852 [2023-11-19 04:53:59,041 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 91 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:53:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 39 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:53:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 04:53:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-19 04:53:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 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) [2023-11-19 04:53:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2023-11-19 04:53:59,058 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 17 [2023-11-19 04:53:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:53:59,059 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2023-11-19 04:53:59,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:53:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2023-11-19 04:53:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:53:59,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:53:59,060 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1] [2023-11-19 04:53:59,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 04:53:59,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a526f3e4-b3ae-4ede-8889-df89d7e8707b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:53:59,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:53:59,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:53:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash -152921595, now seen corresponding path program 4 times [2023-11-19 04:53:59,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:53:59,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896549486] [2023-11-19 04:53:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:53:59,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:53:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat