./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh --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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:22:39,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:22:40,014 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 13:22:40,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:22:40,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:22:40,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:22:40,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:22:40,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:22:40,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:22:40,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:22:40,047 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:22:40,047 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:22:40,048 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:22:40,049 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:22:40,049 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:22:40,050 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:22:40,050 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:22:40,051 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:22:40,051 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:22:40,052 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:22:40,052 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:22:40,057 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:22:40,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:22:40,058 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:22:40,059 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:22:40,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:22:40,059 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:22:40,060 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:22:40,060 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:22:40,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:22:40,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:22:40,061 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:22:40,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:22:40,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:22:40,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:22:40,062 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:22:40,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:22:40,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:22:40,063 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:22:40,063 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:22:40,063 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:22:40,064 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:22:40,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:22:40,064 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:22:40,064 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:22:40,065 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:22:40,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:22:40,065 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_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2023-12-02 13:22:40,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:22:40,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:22:40,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:22:40,331 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:22:40,331 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:22:40,332 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2023-12-02 13:22:43,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:22:43,424 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:22:43,425 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2023-12-02 13:22:43,434 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/data/17bc2135f/85a2e1ce83be4083814a100ae27fd51d/FLAGd3ba8730f [2023-12-02 13:22:43,452 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/data/17bc2135f/85a2e1ce83be4083814a100ae27fd51d [2023-12-02 13:22:43,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:22:43,458 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:22:43,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:22:43,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:22:43,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:22:43,467 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534272da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43, skipping insertion in model container [2023-12-02 13:22:43,469 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:22:43,681 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_1262ec7e-6437-400f-9c25-a597dd22142c/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2023-12-02 13:22:43,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:22:43,714 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:22:43,730 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_1262ec7e-6437-400f-9c25-a597dd22142c/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2023-12-02 13:22:43,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:22:43,754 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:22:43,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43 WrapperNode [2023-12-02 13:22:43,755 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:22:43,756 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:22:43,756 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:22:43,756 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:22:43,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,796 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2023-12-02 13:22:43,796 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:22:43,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:22:43,797 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:22:43,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:22:43,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,810 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,810 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,824 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:22:43,825 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:22:43,825 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:22:43,825 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:22:43,826 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (1/1) ... [2023-12-02 13:22:43,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:22:43,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:43,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:22:43,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:22:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:22:43,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:22:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:22:43,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:22:43,996 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:22:43,999 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:22:44,153 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:22:44,288 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:22:44,288 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 13:22:44,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:22:44 BoogieIcfgContainer [2023-12-02 13:22:44,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:22:44,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:22:44,293 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:22:44,297 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:22:44,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:22:43" (1/3) ... [2023-12-02 13:22:44,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ade9333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:22:44, skipping insertion in model container [2023-12-02 13:22:44,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:22:43" (2/3) ... [2023-12-02 13:22:44,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ade9333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:22:44, skipping insertion in model container [2023-12-02 13:22:44,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:22:44" (3/3) ... [2023-12-02 13:22:44,301 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2023-12-02 13:22:44,322 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:22:44,322 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:22:44,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:22:44,377 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;@625dc955, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:22:44,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:22:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2023-12-02 13:22:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 13:22:44,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:44,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 13:22:44,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:44,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash 108685352, now seen corresponding path program 1 times [2023-12-02 13:22:44,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:44,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509444439] [2023-12-02 13:22:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:44,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:44,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:44,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509444439] [2023-12-02 13:22:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509444439] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:22:44,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:22:44,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:22:44,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799839261] [2023-12-02 13:22:44,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:22:44,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:22:44,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:22:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:22:44,720 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-12-02 13:22:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:44,753 INFO L93 Difference]: Finished difference Result 16 states and 23 transitions. [2023-12-02 13:22:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:22:44,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2023-12-02 13:22:44,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:44,764 INFO L225 Difference]: With dead ends: 16 [2023-12-02 13:22:44,764 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 13:22:44,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:22:44,771 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:44,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:22:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 13:22:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-02 13:22:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2023-12-02 13:22:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-12-02 13:22:44,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-12-02 13:22:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:44,802 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-12-02 13:22:44,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-12-02 13:22:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-12-02 13:22:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 13:22:44,803 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:44,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 13:22:44,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:22:44,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:44,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash -925984695, now seen corresponding path program 1 times [2023-12-02 13:22:44,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320338034] [2023-12-02 13:22:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:44,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:44,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320338034] [2023-12-02 13:22:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320338034] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:44,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902696902] [2023-12-02 13:22:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:44,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:44,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:44,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:44,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:22:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:45,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:22:45,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:45,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:45,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902696902] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:22:45,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672525976] [2023-12-02 13:22:45,141 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:22:45,141 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:45,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:45,151 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:45,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:45,706 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:46,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (exists ((|v_ULTIMATE.start_main_#t~post6#1_34| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|) (or (and (or (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_34|) (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_34|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0))))) (<= 1 ~last~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:22:46,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:46,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:46,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-12-02 13:22:46,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302988558] [2023-12-02 13:22:46,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:46,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:22:46,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:22:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:22:46,238 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:22:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:46,298 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2023-12-02 13:22:46,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:22:46,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 13:22:46,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:46,300 INFO L225 Difference]: With dead ends: 19 [2023-12-02 13:22:46,300 INFO L226 Difference]: Without dead ends: 12 [2023-12-02 13:22:46,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:22:46,303 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:46,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:22:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-12-02 13:22:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-12-02 13:22:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2023-12-02 13:22:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-12-02 13:22:46,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-12-02 13:22:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:46,310 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-12-02 13:22:46,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:22:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-12-02 13:22:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 13:22:46,311 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:46,311 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-12-02 13:22:46,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:22:46,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:46,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:46,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash 303425640, now seen corresponding path program 2 times [2023-12-02 13:22:46,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:46,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274649493] [2023-12-02 13:22:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:46,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:46,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:46,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274649493] [2023-12-02 13:22:46,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274649493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:46,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022483896] [2023-12-02 13:22:46,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:22:46,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:46,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:46,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:46,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:22:46,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:22:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:22:46,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:22:46,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:46,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:46,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022483896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:22:46,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189318149] [2023-12-02 13:22:46,906 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:22:46,906 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:46,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:46,907 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:46,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:47,169 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:47,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '209#(and (exists ((|v_ULTIMATE.start_main_#t~post6#1_36| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|) (or (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_36|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0)) (and (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_36|) (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1))))))) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (<= 1 ~last~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:22:47,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:47,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:47,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-12-02 13:22:47,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645825012] [2023-12-02 13:22:47,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:47,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 13:22:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 13:22:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2023-12-02 13:22:47,681 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:22:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:47,808 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-12-02 13:22:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:22:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 13:22:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:47,811 INFO L225 Difference]: With dead ends: 28 [2023-12-02 13:22:47,812 INFO L226 Difference]: Without dead ends: 18 [2023-12-02 13:22:47,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2023-12-02 13:22:47,814 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:47,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:22:47,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-02 13:22:47,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-12-02 13:22:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:22:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-02 13:22:47,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2023-12-02 13:22:47,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:47,821 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-02 13:22:47,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:22:47,821 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-02 13:22:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:22:47,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:47,822 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-12-02 13:22:47,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 13:22:48,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:48,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:48,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash -431543096, now seen corresponding path program 3 times [2023-12-02 13:22:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:48,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999304496] [2023-12-02 13:22:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:48,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:48,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:48,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999304496] [2023-12-02 13:22:48,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999304496] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:48,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797651476] [2023-12-02 13:22:48,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:22:48,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:48,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:48,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:22:48,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:22:48,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:22:48,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 13:22:48,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:48,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:48,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:48,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797651476] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:22:48,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664289086] [2023-12-02 13:22:48,833 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:22:48,833 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:48,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:48,834 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:48,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:49,062 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:49,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '420#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (exists ((|v_ULTIMATE.start_main_#t~post6#1_38| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (or (and (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_38|) (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_38|) (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (<= 1 ~last~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:22:49,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:49,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:49,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-12-02 13:22:49,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367092496] [2023-12-02 13:22:49,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:49,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 13:22:49,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 13:22:49,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2023-12-02 13:22:49,485 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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) [2023-12-02 13:22:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:49,762 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2023-12-02 13:22:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 13:22:49,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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 [2023-12-02 13:22:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:49,764 INFO L225 Difference]: With dead ends: 46 [2023-12-02 13:22:49,764 INFO L226 Difference]: Without dead ends: 30 [2023-12-02 13:22:49,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=938, Invalid=1714, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 13:22:49,766 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:49,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:22:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-02 13:22:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-12-02 13:22:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 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) [2023-12-02 13:22:49,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-02 13:22:49,773 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2023-12-02 13:22:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:49,774 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-02 13:22:49,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 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) [2023-12-02 13:22:49,774 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-02 13:22:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 13:22:49,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:49,775 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-12-02 13:22:49,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 13:22:49,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:49,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:49,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1633246600, now seen corresponding path program 4 times [2023-12-02 13:22:49,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:49,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956511473] [2023-12-02 13:22:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:49,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:50,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956511473] [2023-12-02 13:22:50,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956511473] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:50,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938904387] [2023-12-02 13:22:50,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:22:50,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:50,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:50,606 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:50,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:22:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:50,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 13:22:50,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:51,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938904387] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:22:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550701561] [2023-12-02 13:22:51,787 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:22:51,787 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:51,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:51,788 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:51,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:51,923 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:52,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '811#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (<= 1 ~last~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (exists ((|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_#t~post6#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (or (and (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_40|) (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_40|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:22:52,400 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:52,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:52,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2023-12-02 13:22:52,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556794175] [2023-12-02 13:22:52,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:52,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-02 13:22:52,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:52,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-02 13:22:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=3458, Unknown=0, NotChecked=0, Total=5852 [2023-12-02 13:22:52,412 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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) [2023-12-02 13:22:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:22:53,308 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2023-12-02 13:22:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-02 13:22:53,309 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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 27 [2023-12-02 13:22:53,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:22:53,310 INFO L225 Difference]: With dead ends: 82 [2023-12-02 13:22:53,310 INFO L226 Difference]: Without dead ends: 54 [2023-12-02 13:22:53,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3590, Invalid=6310, Unknown=0, NotChecked=0, Total=9900 [2023-12-02 13:22:53,315 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:22:53,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:22:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-02 13:22:53,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-12-02 13:22:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2023-12-02 13:22:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-12-02 13:22:53,326 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2023-12-02 13:22:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:22:53,326 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-12-02 13:22:53,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 states have internal predecessors, (76), 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) [2023-12-02 13:22:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-12-02 13:22:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 13:22:53,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:22:53,328 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2023-12-02 13:22:53,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 13:22:53,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:53,529 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:22:53,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:22:53,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1554276104, now seen corresponding path program 5 times [2023-12-02 13:22:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:22:53,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194031905] [2023-12-02 13:22:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:22:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:22:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:22:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:55,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:22:55,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194031905] [2023-12-02 13:22:55,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194031905] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:22:55,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389638729] [2023-12-02 13:22:55,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:22:55,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:22:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:22:55,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:22:55,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:22:55,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-12-02 13:22:55,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:22:55,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 13:22:55,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:22:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:56,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:22:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:22:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389638729] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:22:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1595677441] [2023-12-02 13:22:58,966 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:22:58,966 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:22:58,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:22:58,967 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:22:58,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:59,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:22:59,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1562#(and (exists ((|v_ULTIMATE.start_main_#t~post6#1_42| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (or (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_42|)) (and (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_42|) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (<= 1 ~last~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:22:59,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:22:59,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:22:59,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2023-12-02 13:22:59,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791792146] [2023-12-02 13:22:59,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:22:59,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2023-12-02 13:22:59,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:22:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2023-12-02 13:22:59,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9378, Invalid=12674, Unknown=0, NotChecked=0, Total=22052 [2023-12-02 13:22:59,618 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 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) [2023-12-02 13:23:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:02,425 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2023-12-02 13:23:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-12-02 13:23:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 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 51 [2023-12-02 13:23:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:02,427 INFO L225 Difference]: With dead ends: 154 [2023-12-02 13:23:02,428 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 13:23:02,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14429 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=14078, Invalid=24142, Unknown=0, NotChecked=0, Total=38220 [2023-12-02 13:23:02,437 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:02,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 37 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:23:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 13:23:02,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-12-02 13:23:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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) [2023-12-02 13:23:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-12-02 13:23:02,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2023-12-02 13:23:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:02,455 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-12-02 13:23:02,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 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) [2023-12-02 13:23:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-12-02 13:23:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 13:23:02,459 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:02,459 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2023-12-02 13:23:02,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:23:02,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:23:02,660 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:02,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1760239096, now seen corresponding path program 6 times [2023-12-02 13:23:02,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:02,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124442605] [2023-12-02 13:23:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:02,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:08,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:08,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124442605] [2023-12-02 13:23:08,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124442605] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:08,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140964620] [2023-12-02 13:23:08,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:23:08,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:08,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:08,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:23:08,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:23:08,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:23:08,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 13:23:08,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:23:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:12,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:23:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:22,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140964620] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:23:22,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648880300] [2023-12-02 13:23:22,443 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:23:22,443 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:23:22,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:23:22,443 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:23:22,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:23:22,581 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:23:23,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3033#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (<= 1 ~last~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_#t~post6#1_44| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (or (and (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_44|)) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_44|))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (= ~SIZE~0 200000) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:23:23,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:23:23,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:23:23,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 288 [2023-12-02 13:23:23,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545676923] [2023-12-02 13:23:23,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:23:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 289 states [2023-12-02 13:23:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:23:23,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 289 interpolants. [2023-12-02 13:23:23,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37170, Invalid=48386, Unknown=0, NotChecked=0, Total=85556 [2023-12-02 13:23:23,299 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 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) [2023-12-02 13:23:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:23:33,464 INFO L93 Difference]: Finished difference Result 298 states and 396 transitions. [2023-12-02 13:23:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-12-02 13:23:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 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 99 [2023-12-02 13:23:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:23:33,467 INFO L225 Difference]: With dead ends: 298 [2023-12-02 13:23:33,467 INFO L226 Difference]: Without dead ends: 198 [2023-12-02 13:23:33,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56525 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=55790, Invalid=94366, Unknown=0, NotChecked=0, Total=150156 [2023-12-02 13:23:33,476 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:23:33,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 37 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:23:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-12-02 13:23:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2023-12-02 13:23:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 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) [2023-12-02 13:23:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2023-12-02 13:23:33,496 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2023-12-02 13:23:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:23:33,496 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2023-12-02 13:23:33,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 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) [2023-12-02 13:23:33,497 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2023-12-02 13:23:33,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-12-02 13:23:33,500 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:23:33,500 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2023-12-02 13:23:33,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 13:23:33,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-12-02 13:23:33,701 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:23:33,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:23:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1432348680, now seen corresponding path program 7 times [2023-12-02 13:23:33,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:23:33,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956108713] [2023-12-02 13:23:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:23:33,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:23:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:23:52,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:23:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956108713] [2023-12-02 13:23:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956108713] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:23:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100181981] [2023-12-02 13:23:52,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 13:23:52,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:23:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:23:52,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:23:52,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:23:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:23:52,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-02 13:23:52,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:24:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:24:07,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:24:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:24:46,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100181981] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:24:46,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827823818] [2023-12-02 13:24:46,452 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:24:46,452 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:24:46,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:24:46,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:24:46,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:24:46,604 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:24:47,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5944#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (<= 1 ~last~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (exists ((|v_ULTIMATE.start_main_#t~post6#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (or (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_46|) (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_46|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0))) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:24:47,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:24:47,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:24:47,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 576 [2023-12-02 13:24:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012914995] [2023-12-02 13:24:47,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:24:47,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 577 states [2023-12-02 13:24:47,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:24:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 577 interpolants. [2023-12-02 13:24:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148050, Invalid=188930, Unknown=0, NotChecked=0, Total=336980 [2023-12-02 13:24:47,742 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 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) [2023-12-02 13:25:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:28,235 INFO L93 Difference]: Finished difference Result 586 states and 780 transitions. [2023-12-02 13:25:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2023-12-02 13:25:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 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 195 [2023-12-02 13:25:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:28,240 INFO L225 Difference]: With dead ends: 586 [2023-12-02 13:25:28,240 INFO L226 Difference]: Without dead ends: 390 [2023-12-02 13:25:28,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223661 ImplicationChecksByTransitivity, 104.3s TimeCoverageRelationStatistics Valid=222158, Invalid=373054, Unknown=0, NotChecked=0, Total=595212 [2023-12-02 13:25:28,275 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 198 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:28,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 41 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:25:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2023-12-02 13:25:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2023-12-02 13:25:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 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) [2023-12-02 13:25:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2023-12-02 13:25:28,317 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2023-12-02 13:25:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:28,317 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2023-12-02 13:25:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 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) [2023-12-02 13:25:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2023-12-02 13:25:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2023-12-02 13:25:28,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:28,325 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2023-12-02 13:25:28,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:25:28,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 13:25:28,526 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:25:28,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash -945949688, now seen corresponding path program 8 times [2023-12-02 13:25:28,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:28,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742630597] [2023-12-02 13:25:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:28,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:47,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:47,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742630597] [2023-12-02 13:26:47,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742630597] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:47,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824568514] [2023-12-02 13:26:47,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:26:47,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:26:47,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:26:47,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:26:47,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:26:49,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2023-12-02 13:26:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:26:49,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 385 conjunts are in the unsatisfiable core [2023-12-02 13:26:49,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:27:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:27:47,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:30:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:30:28,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824568514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:30:28,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157625484] [2023-12-02 13:30:28,527 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 13:30:28,528 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:30:28,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:30:28,528 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:30:28,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:30:28,654 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:30:30,554 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11735#(and (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~st~0#1| 1) (<= 1 ~last~0) (exists ((|v_ULTIMATE.start_main_#t~post6#1_48| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (< 199999 ~last~0) (not (= |ULTIMATE.start_main_~st~0#1| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_48|)) (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= ~last~0 199999) (= |ULTIMATE.start_main_~st~0#1| 1))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|)))) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_48|))) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (<= 200000 |ULTIMATE.start_main_~c~0#1|) (or (not (= |ULTIMATE.start_main_~c~0#1| 200000)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= ~last~0 2147483647))' at error location [2023-12-02 13:30:30,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:30:30,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:30:30,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 1152 [2023-12-02 13:30:30,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540195542] [2023-12-02 13:30:30,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:30:30,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1153 states [2023-12-02 13:30:30,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:30:30,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1153 interpolants. [2023-12-02 13:30:30,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590994, Invalid=746498, Unknown=0, NotChecked=0, Total=1337492 [2023-12-02 13:30:30,694 INFO L87 Difference]: Start difference. First operand 389 states and 390 transitions. Second operand has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 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) [2023-12-02 13:33:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:33:27,452 INFO L93 Difference]: Finished difference Result 1162 states and 1548 transitions. [2023-12-02 13:33:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 769 states. [2023-12-02 13:33:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 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 387 [2023-12-02 13:33:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:33:27,458 INFO L225 Difference]: With dead ends: 1162 [2023-12-02 13:33:27,458 INFO L226 Difference]: Without dead ends: 774 [2023-12-02 13:33:27,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1927 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 1538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889709 ImplicationChecksByTransitivity, 418.2s TimeCoverageRelationStatistics Valid=886670, Invalid=1483390, Unknown=0, NotChecked=0, Total=2370060 [2023-12-02 13:33:27,584 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 390 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:33:27,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 37 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:33:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-12-02 13:33:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 773. [2023-12-02 13:33:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.0025906735751295) internal successors, (774), 772 states have internal predecessors, (774), 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) [2023-12-02 13:33:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 774 transitions. [2023-12-02 13:33:27,633 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 774 transitions. Word has length 387 [2023-12-02 13:33:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:33:27,634 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 774 transitions. [2023-12-02 13:33:27,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 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) [2023-12-02 13:33:27,635 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 774 transitions. [2023-12-02 13:33:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2023-12-02 13:33:27,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:33:27,651 INFO L195 NwaCegarLoop]: trace histogram [766, 1, 1, 1, 1, 1] [2023-12-02 13:33:27,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 13:33:27,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1262ec7e-6437-400f-9c25-a597dd22142c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:33:27,852 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:33:27,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:33:27,852 INFO L85 PathProgramCache]: Analyzing trace with hash 45747208, now seen corresponding path program 9 times [2023-12-02 13:33:27,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:33:27,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234038597] [2023-12-02 13:33:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:33:27,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:33:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat