./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/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_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/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_1430eaf7-b3b9-40c3-8196-9ada9caa6399/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 f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:33,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:33,141 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:01:33,146 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:33,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:33,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:33,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:33,177 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:33,178 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:33,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:33,180 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:33,180 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:33,181 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:33,182 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:33,185 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:33,185 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:33,186 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:33,187 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:33,187 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:33,188 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:33,188 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:33,189 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:33,190 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:33,191 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:33,191 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:01:33,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:33,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:01:33,193 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:33,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:33,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:33,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:33,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:01:33,196 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:33,197 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:33,197 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:33,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:33,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:33,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:33,217 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:33,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:33,218 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:33,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:33,219 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:33,219 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:33,220 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:33,220 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_1430eaf7-b3b9-40c3-8196-9ada9caa6399/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 [2023-11-12 01:01:33,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:33,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:33,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:33,608 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:33,608 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:33,611 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loop-simple/deep-nested.c [2023-11-12 01:01:36,792 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:01:36,970 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:01:36,971 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/sv-benchmarks/c/loop-simple/deep-nested.c [2023-11-12 01:01:36,978 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/data/9988de73a/7932c2eb6ad1432083e090238e798a79/FLAG112bee3d5 [2023-11-12 01:01:36,993 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/data/9988de73a/7932c2eb6ad1432083e090238e798a79 [2023-11-12 01:01:36,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:01:36,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:01:36,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:36,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:01:37,004 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:01:37,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:36" (1/1) ... [2023-11-12 01:01:37,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4507708d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37, skipping insertion in model container [2023-11-12 01:01:37,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:36" (1/1) ... [2023-11-12 01:01:37,026 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:01:37,200 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_1430eaf7-b3b9-40c3-8196-9ada9caa6399/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2023-11-12 01:01:37,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:37,216 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:01:37,231 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_1430eaf7-b3b9-40c3-8196-9ada9caa6399/sv-benchmarks/c/loop-simple/deep-nested.c[863,876] [2023-11-12 01:01:37,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:37,246 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:01:37,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37 WrapperNode [2023-11-12 01:01:37,246 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:37,247 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:37,248 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:01:37,248 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:01:37,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,283 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2023-11-12 01:01:37,283 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:37,284 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:01:37,284 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:01:37,284 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:01:37,292 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,314 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,315 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:01:37,318 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:01:37,318 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:01:37,319 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:01:37,320 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (1/1) ... [2023-11-12 01:01:37,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:37,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:01:37,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:01:37,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:01:37,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:01:37,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:01:37,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:01:37,456 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:37,457 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:37,614 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:37,670 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:37,670 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 01:01:37,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:37 BoogieIcfgContainer [2023-11-12 01:01:37,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:37,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:37,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:37,680 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:37,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:01:36" (1/3) ... [2023-11-12 01:01:37,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e21258a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:37, skipping insertion in model container [2023-11-12 01:01:37,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:37" (2/3) ... [2023-11-12 01:01:37,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e21258a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:37, skipping insertion in model container [2023-11-12 01:01:37,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:37" (3/3) ... [2023-11-12 01:01:37,684 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2023-11-12 01:01:37,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:37,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:01:37,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:37,779 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;@20a25c37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:37,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:01:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 01:01:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 01:01:37,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:37,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:37,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:37,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1672362000, now seen corresponding path program 1 times [2023-11-12 01:01:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:37,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639902849] [2023-11-12 01:01:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:37,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:38,231 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 01:01:38,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639902849] [2023-11-12 01:01:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639902849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:38,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:38,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 01:01:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422254779] [2023-11-12 01:01:38,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:38,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:38,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:38,296 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 01:01:38,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:38,437 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2023-11-12 01:01:38,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:01:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 01:01:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:38,450 INFO L225 Difference]: With dead ends: 24 [2023-11-12 01:01:38,450 INFO L226 Difference]: Without dead ends: 13 [2023-11-12 01:01:38,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:38,458 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 14 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:38,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-12 01:01:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-11-12 01:01:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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 01:01:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-12 01:01:38,498 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2023-11-12 01:01:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:38,499 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-12 01:01:38,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 01:01:38,499 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-12 01:01:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 01:01:38,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:38,500 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:38,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:01:38,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:38,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash 288176442, now seen corresponding path program 1 times [2023-11-12 01:01:38,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:38,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395723738] [2023-11-12 01:01:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:38,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:01:39,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:39,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395723738] [2023-11-12 01:01:39,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395723738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:39,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:39,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:01:39,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667842365] [2023-11-12 01:01:39,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:39,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:01:39,034 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2023-11-12 01:01:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:39,098 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2023-11-12 01:01:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) Word has length 11 [2023-11-12 01:01:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:39,101 INFO L225 Difference]: With dead ends: 23 [2023-11-12 01:01:39,101 INFO L226 Difference]: Without dead ends: 21 [2023-11-12 01:01:39,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 01:01:39,103 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:39,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-12 01:01:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-12 01:01:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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 01:01:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2023-11-12 01:01:39,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2023-11-12 01:01:39,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:39,116 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2023-11-12 01:01:39,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2023-11-12 01:01:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2023-11-12 01:01:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 01:01:39,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:39,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:39,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:01:39,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:39,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:39,120 INFO L85 PathProgramCache]: Analyzing trace with hash 426812611, now seen corresponding path program 1 times [2023-11-12 01:01:39,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:39,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551947305] [2023-11-12 01:01:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:39,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:01:39,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551947305] [2023-11-12 01:01:39,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551947305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:39,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215505454] [2023-11-12 01:01:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:39,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:39,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:39,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:39,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:01:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:39,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:01:39,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:01:39,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215505454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:39,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-12 01:01:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071408349] [2023-11-12 01:01:39,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:01:39,678 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 01:01:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:39,777 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2023-11-12 01:01:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13 [2023-11-12 01:01:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:39,780 INFO L225 Difference]: With dead ends: 48 [2023-11-12 01:01:39,780 INFO L226 Difference]: Without dead ends: 37 [2023-11-12 01:01:39,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:39,783 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:39,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:39,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-12 01:01:39,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2023-11-12 01:01:39,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 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) [2023-11-12 01:01:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2023-11-12 01:01:39,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2023-11-12 01:01:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:39,796 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2023-11-12 01:01:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 01:01:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2023-11-12 01:01:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 01:01:39,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:39,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:39,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:40,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:40,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:40,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -542021410, now seen corresponding path program 1 times [2023-11-12 01:01:40,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:40,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079113464] [2023-11-12 01:01:40,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:40,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:01:40,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079113464] [2023-11-12 01:01:40,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079113464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358600305] [2023-11-12 01:01:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:40,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:40,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:01:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:40,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:01:40,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 01:01:40,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:40,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358600305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:40,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:40,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-12 01:01:40,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183210273] [2023-11-12 01:01:40,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:40,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:40,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:40,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:40,513 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 01:01:40,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:40,676 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2023-11-12 01:01:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:40,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) Word has length 15 [2023-11-12 01:01:40,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:40,682 INFO L225 Difference]: With dead ends: 56 [2023-11-12 01:01:40,682 INFO L226 Difference]: Without dead ends: 37 [2023-11-12 01:01:40,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:01:40,684 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:40,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:40,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-12 01:01:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-11-12 01:01:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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 01:01:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-11-12 01:01:40,700 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2023-11-12 01:01:40,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:40,701 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-11-12 01:01:40,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 01:01:40,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-11-12 01:01:40,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 01:01:40,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:40,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:40,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:40,909 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:40,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -113827563, now seen corresponding path program 1 times [2023-11-12 01:01:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:40,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704810305] [2023-11-12 01:01:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:40,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 01:01:41,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:41,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704810305] [2023-11-12 01:01:41,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704810305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:41,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953974136] [2023-11-12 01:01:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:41,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:41,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:41,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:41,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:01:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:41,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 01:01:41,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 01:01:41,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:41,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953974136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:41,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:41,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-12 01:01:41,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978588256] [2023-11-12 01:01:41,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:41,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:41,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:41,329 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 01:01:41,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:41,469 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2023-11-12 01:01:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:01:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 [2023-11-12 01:01:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:41,473 INFO L225 Difference]: With dead ends: 58 [2023-11-12 01:01:41,473 INFO L226 Difference]: Without dead ends: 37 [2023-11-12 01:01:41,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:01:41,477 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:41,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:01:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-12 01:01:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2023-11-12 01:01:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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 01:01:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-11-12 01:01:41,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2023-11-12 01:01:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:41,513 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-11-12 01:01:41,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 01:01:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-11-12 01:01:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 01:01:41,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:41,524 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:41,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:41,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:41,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:41,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 862953470, now seen corresponding path program 1 times [2023-11-12 01:01:41,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:41,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069389809] [2023-11-12 01:01:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:41,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 01:01:42,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:42,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069389809] [2023-11-12 01:01:42,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069389809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:42,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741567841] [2023-11-12 01:01:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:42,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:42,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:42,177 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:42,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:01:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:42,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 01:01:42,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:01:42,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:01:42,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741567841] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:42,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [323583822] [2023-11-12 01:01:42,727 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:01:42,728 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:42,732 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:42,739 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:42,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:43,906 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:44,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '826#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|))' at error location [2023-11-12 01:01:44,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:44,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:44,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-12 01:01:44,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942984667] [2023-11-12 01:01:44,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:44,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 01:01:44,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 01:01:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:01:44,392 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 01:01:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:46,439 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2023-11-12 01:01:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 01:01:46,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 22 [2023-11-12 01:01:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:46,442 INFO L225 Difference]: With dead ends: 134 [2023-11-12 01:01:46,442 INFO L226 Difference]: Without dead ends: 90 [2023-11-12 01:01:46,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=522, Invalid=2028, Unknown=0, NotChecked=0, Total=2550 [2023-11-12 01:01:46,445 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 295 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:46,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 5 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-12 01:01:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2023-11-12 01:01:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 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 01:01:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2023-11-12 01:01:46,473 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 22 [2023-11-12 01:01:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:46,474 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2023-11-12 01:01:46,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 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 01:01:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2023-11-12 01:01:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 01:01:46,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:46,476 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-12 01:01:46,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:46,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:46,682 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:46,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:46,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1866441539, now seen corresponding path program 2 times [2023-11-12 01:01:46,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:46,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011508898] [2023-11-12 01:01:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:46,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-12 01:01:47,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:47,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011508898] [2023-11-12 01:01:47,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011508898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:47,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138046424] [2023-11-12 01:01:47,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:47,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:47,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:47,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:47,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:01:47,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 01:01:47,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:47,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 01:01:47,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-12 01:01:47,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:47,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138046424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:47,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:47,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-12 01:01:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678406573] [2023-11-12 01:01:47,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:47,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:47,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:01:47,265 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 01:01:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:47,340 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2023-11-12 01:01:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:01:47,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 40 [2023-11-12 01:01:47,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:47,342 INFO L225 Difference]: With dead ends: 97 [2023-11-12 01:01:47,342 INFO L226 Difference]: Without dead ends: 95 [2023-11-12 01:01:47,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:01:47,343 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:47,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:01:47,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-12 01:01:47,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-11-12 01:01:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 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 01:01:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2023-11-12 01:01:47,376 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 40 [2023-11-12 01:01:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:47,377 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2023-11-12 01:01:47,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 01:01:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2023-11-12 01:01:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 01:01:47,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:47,379 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-11-12 01:01:47,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:47,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:47,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:47,586 INFO L85 PathProgramCache]: Analyzing trace with hash 625675347, now seen corresponding path program 3 times [2023-11-12 01:01:47,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:47,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854863521] [2023-11-12 01:01:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:47,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:48,044 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-12 01:01:48,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:48,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854863521] [2023-11-12 01:01:48,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854863521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443504766] [2023-11-12 01:01:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:01:48,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:48,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:48,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:48,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:01:48,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:01:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:48,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:01:48,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 20 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:48,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 91 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-12 01:01:48,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443504766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:48,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168755571] [2023-11-12 01:01:48,532 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:01:48,533 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:48,533 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:48,533 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:48,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:49,312 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:49,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1922#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|))' at error location [2023-11-12 01:01:49,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:49,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:49,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-11-12 01:01:49,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086246086] [2023-11-12 01:01:49,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:49,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 01:01:49,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 01:01:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-11-12 01:01:49,871 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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 01:01:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:50,626 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2023-11-12 01:01:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 01:01:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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 50 [2023-11-12 01:01:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:50,628 INFO L225 Difference]: With dead ends: 223 [2023-11-12 01:01:50,628 INFO L226 Difference]: Without dead ends: 122 [2023-11-12 01:01:50,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 01:01:50,631 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:50,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 13 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:01:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-12 01:01:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2023-11-12 01:01:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 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 01:01:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2023-11-12 01:01:50,673 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 50 [2023-11-12 01:01:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:50,673 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2023-11-12 01:01:50,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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 01:01:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2023-11-12 01:01:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-12 01:01:50,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:50,677 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-11-12 01:01:50,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:50,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:50,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:50,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1934891245, now seen corresponding path program 4 times [2023-11-12 01:01:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:50,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547929527] [2023-11-12 01:01:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 15 proven. 209 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2023-11-12 01:01:51,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547929527] [2023-11-12 01:01:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547929527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332165202] [2023-11-12 01:01:51,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:01:51,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:51,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:51,529 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:51,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:01:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:51,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 01:01:51,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 262 proven. 87 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-12 01:01:51,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 260 proven. 89 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-12 01:01:52,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332165202] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:52,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004932320] [2023-11-12 01:01:52,212 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:01:52,212 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:52,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:52,213 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:52,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:52,873 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:53,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2933#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|))' at error location [2023-11-12 01:01:53,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:53,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:53,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-12 01:01:53,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921853420] [2023-11-12 01:01:53,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:53,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 01:01:53,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:53,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 01:01:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-11-12 01:01:53,386 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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 01:02:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:00,408 INFO L93 Difference]: Finished difference Result 644 states and 814 transitions. [2023-11-12 01:02:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-12 01:02:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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 74 [2023-11-12 01:02:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:00,412 INFO L225 Difference]: With dead ends: 644 [2023-11-12 01:02:00,413 INFO L226 Difference]: Without dead ends: 537 [2023-11-12 01:02:00,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1215, Invalid=6441, Unknown=0, NotChecked=0, Total=7656 [2023-11-12 01:02:00,419 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 399 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:00,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 11 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 01:02:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-12 01:02:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 335. [2023-11-12 01:02:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.122754491017964) internal successors, (375), 334 states have internal predecessors, (375), 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 01:02:00,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2023-11-12 01:02:00,548 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 74 [2023-11-12 01:02:00,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:00,548 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2023-11-12 01:02:00,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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 01:02:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2023-11-12 01:02:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-12 01:02:00,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:00,556 INFO L195 NwaCegarLoop]: trace histogram [85, 84, 84, 13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1] [2023-11-12 01:02:00,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:00,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:00,759 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:00,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash 273108276, now seen corresponding path program 5 times [2023-11-12 01:02:00,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:00,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283401492] [2023-11-12 01:02:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 60 proven. 1944 refuted. 0 times theorem prover too weak. 10363 trivial. 0 not checked. [2023-11-12 01:02:03,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:03,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283401492] [2023-11-12 01:02:03,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283401492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:03,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880302557] [2023-11-12 01:02:03,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:02:03,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:03,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:03,732 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:03,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 01:02:03,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 01:02:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:03,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:02:03,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 1668 proven. 0 refuted. 0 times theorem prover too weak. 10699 trivial. 0 not checked. [2023-11-12 01:02:04,435 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:02:04,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880302557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:02:04,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:02:04,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2023-11-12 01:02:04,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842372536] [2023-11-12 01:02:04,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:02:04,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:02:04,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:02:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:02:04,438 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 01:02:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:04,647 INFO L93 Difference]: Finished difference Result 603 states and 656 transitions. [2023-11-12 01:02:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:02:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 332 [2023-11-12 01:02:04,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:04,654 INFO L225 Difference]: With dead ends: 603 [2023-11-12 01:02:04,654 INFO L226 Difference]: Without dead ends: 601 [2023-11-12 01:02:04,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:02:04,656 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:04,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:02:04,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-11-12 01:02:04,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 354. [2023-11-12 01:02:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.1189801699716715) internal successors, (395), 353 states have internal predecessors, (395), 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 01:02:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 395 transitions. [2023-11-12 01:02:04,781 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 395 transitions. Word has length 332 [2023-11-12 01:02:04,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:04,782 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 395 transitions. [2023-11-12 01:02:04,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 01:02:04,782 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 395 transitions. [2023-11-12 01:02:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2023-11-12 01:02:04,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:04,792 INFO L195 NwaCegarLoop]: trace histogram [91, 90, 90, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2023-11-12 01:02:04,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:04,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 01:02:04,997 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:04,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1525149025, now seen corresponding path program 6 times [2023-11-12 01:02:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:04,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388824989] [2023-11-12 01:02:04,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:04,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 61 proven. 2090 refuted. 0 times theorem prover too weak. 11985 trivial. 0 not checked. [2023-11-12 01:02:07,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:07,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388824989] [2023-11-12 01:02:07,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388824989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:07,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370443770] [2023-11-12 01:02:07,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:02:07,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:07,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:07,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:07,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 01:02:07,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:02:07,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:02:07,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 01:02:07,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9336 proven. 344 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2023-11-12 01:02:08,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9177 proven. 503 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2023-11-12 01:02:09,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370443770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:09,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1118085567] [2023-11-12 01:02:09,388 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:02:09,389 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:09,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:09,390 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:09,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:10,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:10,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9058#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|))' at error location [2023-11-12 01:02:10,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:10,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:10,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 42 [2023-11-12 01:02:10,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854814634] [2023-11-12 01:02:10,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:10,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-12 01:02:10,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-12 01:02:10,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2070, Unknown=0, NotChecked=0, Total=2352 [2023-11-12 01:02:10,873 INFO L87 Difference]: Start difference. First operand 354 states and 395 transitions. Second operand has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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 01:02:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:02:12,923 INFO L93 Difference]: Finished difference Result 836 states and 969 transitions. [2023-11-12 01:02:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 01:02:12,923 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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 352 [2023-11-12 01:02:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:02:12,926 INFO L225 Difference]: With dead ends: 836 [2023-11-12 01:02:12,926 INFO L226 Difference]: Without dead ends: 448 [2023-11-12 01:02:12,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1021 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=435, Invalid=3225, Unknown=0, NotChecked=0, Total=3660 [2023-11-12 01:02:12,929 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:02:12,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 17 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 01:02:12,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-12 01:02:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 420. [2023-11-12 01:02:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.100238663484487) internal successors, (461), 419 states have internal predecessors, (461), 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 01:02:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 461 transitions. [2023-11-12 01:02:13,038 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 461 transitions. Word has length 352 [2023-11-12 01:02:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:02:13,039 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 461 transitions. [2023-11-12 01:02:13,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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 01:02:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 461 transitions. [2023-11-12 01:02:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2023-11-12 01:02:13,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:02:13,047 INFO L195 NwaCegarLoop]: trace histogram [113, 112, 112, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2023-11-12 01:02:13,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 01:02:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:13,254 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:02:13,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:02:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash 584206835, now seen corresponding path program 7 times [2023-11-12 01:02:13,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:02:13,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438183031] [2023-11-12 01:02:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:02:13,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:02:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 61 proven. 2921 refuted. 0 times theorem prover too weak. 18117 trivial. 0 not checked. [2023-11-12 01:02:16,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:02:16,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438183031] [2023-11-12 01:02:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438183031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:02:16,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103448253] [2023-11-12 01:02:16,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:02:16,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:02:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:02:16,409 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:02:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1430eaf7-b3b9-40c3-8196-9ada9caa6399/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 01:02:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:02:16,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-12 01:02:16,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:02:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10437 proven. 3365 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2023-11-12 01:02:17,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:02:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10435 proven. 3367 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2023-11-12 01:02:18,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103448253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:02:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1937643797] [2023-11-12 01:02:18,893 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:02:18,893 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:02:18,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:02:18,894 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:02:18,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:02:19,434 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:02:20,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13483#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|))' at error location [2023-11-12 01:02:20,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:02:20,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:02:20,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2023-11-12 01:02:20,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131853160] [2023-11-12 01:02:20,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:02:20,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-12 01:02:20,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:02:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-12 01:02:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2325, Unknown=0, NotChecked=0, Total=2550 [2023-11-12 01:02:20,228 INFO L87 Difference]: Start difference. First operand 420 states and 461 transitions. Second operand has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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)