./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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/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_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91 --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 [2023-11-24 23:14:57,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:14:57,851 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:14:57,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:14:57,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:14:57,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:14:57,887 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:14:57,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:14:57,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:14:57,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:14:57,890 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:14:57,891 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:14:57,891 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:14:57,892 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:14:57,893 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:14:57,893 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:14:57,894 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:14:57,895 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:14:57,896 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:14:57,896 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:14:57,897 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:14:57,898 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:14:57,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:14:57,899 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:14:57,900 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:14:57,901 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:14:57,901 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:14:57,902 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:14:57,902 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:14:57,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:14:57,903 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:14:57,904 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:14:57,904 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:14:57,905 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:14:57,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:14:57,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:14:57,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:14:57,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:14:57,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:14:57,907 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:14:57,907 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:14:57,907 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:14:57,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:14:57,908 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:14:57,908 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:14:57,909 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:14:57,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:14:57,909 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_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2023-11-24 23:14:58,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:14:58,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:14:58,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:14:58,312 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:14:58,313 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:14:58,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2023-11-24 23:15:01,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:15:01,657 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:15:01,658 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2023-11-24 23:15:01,666 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/data/e0390cb30/ac28860044614c62b9318f2e97d98f5f/FLAG01e751d34 [2023-11-24 23:15:01,685 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/data/e0390cb30/ac28860044614c62b9318f2e97d98f5f [2023-11-24 23:15:01,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:15:01,690 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:15:01,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:15:01,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:15:01,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:15:01,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:15:01" (1/1) ... [2023-11-24 23:15:01,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639872b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:01, skipping insertion in model container [2023-11-24 23:15:01,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:15:01" (1/1) ... [2023-11-24 23:15:01,726 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:15:01,992 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_40555f04-8f6d-4c28-b834-1534432b3983/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2023-11-24 23:15:02,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:15:02,020 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:15:02,039 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_40555f04-8f6d-4c28-b834-1534432b3983/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2023-11-24 23:15:02,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:15:02,062 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:15:02,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02 WrapperNode [2023-11-24 23:15:02,062 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:15:02,064 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:15:02,064 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:15:02,064 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:15:02,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,082 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,108 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2023-11-24 23:15:02,109 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:15:02,110 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:15:02,110 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:15:02,110 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:15:02,117 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,119 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,127 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,131 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:15:02,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:15:02,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:15:02,133 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:15:02,134 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (1/1) ... [2023-11-24 23:15:02,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:15:02,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:02,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:15:02,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:15:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:15:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:15:02,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:15:02,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:15:02,301 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:15:02,303 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:15:02,460 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:15:02,583 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:15:02,583 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:15:02,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:15:02 BoogieIcfgContainer [2023-11-24 23:15:02,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:15:02,590 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:15:02,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:15:02,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:15:02,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:15:01" (1/3) ... [2023-11-24 23:15:02,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b846189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:15:02, skipping insertion in model container [2023-11-24 23:15:02,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:02" (2/3) ... [2023-11-24 23:15:02,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b846189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:15:02, skipping insertion in model container [2023-11-24 23:15:02,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:15:02" (3/3) ... [2023-11-24 23:15:02,602 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2023-11-24 23:15:02,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:15:02,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:15:02,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:15:02,683 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;@665675a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:15:02,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:15:02,687 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) [2023-11-24 23:15:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:15:02,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:02,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:15:02,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:02,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:02,705 INFO L85 PathProgramCache]: Analyzing trace with hash 108685352, now seen corresponding path program 1 times [2023-11-24 23:15:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623131493] [2023-11-24 23:15:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:02,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:03,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:03,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623131493] [2023-11-24 23:15:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623131493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:03,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:03,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:15:03,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792257827] [2023-11-24 23:15:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:03,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:15:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:15:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:15:03,177 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) [2023-11-24 23:15:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:03,222 INFO L93 Difference]: Finished difference Result 16 states and 23 transitions. [2023-11-24 23:15:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:15:03,234 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 [2023-11-24 23:15:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:03,242 INFO L225 Difference]: With dead ends: 16 [2023-11-24 23:15:03,243 INFO L226 Difference]: Without dead ends: 9 [2023-11-24 23:15:03,246 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 [2023-11-24 23:15:03,250 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 [2023-11-24 23:15:03,251 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] [2023-11-24 23:15:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-24 23:15:03,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-11-24 23:15:03,284 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) [2023-11-24 23:15:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-11-24 23:15:03,286 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-11-24 23:15:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:03,287 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-11-24 23:15:03,287 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) [2023-11-24 23:15:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-11-24 23:15:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:15:03,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:03,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:15:03,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:15:03,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:03,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -925984695, now seen corresponding path program 1 times [2023-11-24 23:15:03,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:03,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200556779] [2023-11-24 23:15:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:03,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:03,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:03,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200556779] [2023-11-24 23:15:03,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200556779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481995537] [2023-11-24 23:15:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:03,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:03,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:03,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:03,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:15:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:03,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:15:03,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:03,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:03,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481995537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:03,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546635761] [2023-11-24 23:15:03,767 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:15:03,768 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:03,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:03,778 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:03,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:15:04,573 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:15:05,229 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 [2023-11-24 23:15:05,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:15:05,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:15:05,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-24 23:15:05,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756107305] [2023-11-24 23:15:05,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:15:05,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 23:15:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 23:15:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:15:05,236 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) [2023-11-24 23:15:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:05,301 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2023-11-24 23:15:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:15:05,302 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 [2023-11-24 23:15:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:05,303 INFO L225 Difference]: With dead ends: 19 [2023-11-24 23:15:05,303 INFO L226 Difference]: Without dead ends: 12 [2023-11-24 23:15:05,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-11-24 23:15:05,306 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 [2023-11-24 23:15:05,307 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] [2023-11-24 23:15:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-24 23:15:05,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-11-24 23:15:05,311 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) [2023-11-24 23:15:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-24 23:15:05,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-11-24 23:15:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:05,313 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-24 23:15:05,313 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) [2023-11-24 23:15:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-24 23:15:05,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:15:05,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:05,315 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-24 23:15:05,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:05,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:05,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:05,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash 303425640, now seen corresponding path program 2 times [2023-11-24 23:15:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253687078] [2023-11-24 23:15:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:05,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:05,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:05,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253687078] [2023-11-24 23:15:05,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253687078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:05,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507923712] [2023-11-24 23:15:05,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:15:05,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:05,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:05,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:05,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:15:05,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:15:05,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:15:05,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:15:05,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:05,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:05,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507923712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:05,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1643426322] [2023-11-24 23:15:05,957 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:15:05,958 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:05,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:05,958 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:05,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:15:06,213 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:15:06,755 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 [2023-11-24 23:15:06,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:15:06,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:15:06,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-24 23:15:06,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25741231] [2023-11-24 23:15:06,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:15:06,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 23:15:06,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:06,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 23:15:06,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2023-11-24 23:15:06,758 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) [2023-11-24 23:15:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:06,912 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-24 23:15:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:15:06,913 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 [2023-11-24 23:15:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:06,914 INFO L225 Difference]: With dead ends: 28 [2023-11-24 23:15:06,914 INFO L226 Difference]: Without dead ends: 18 [2023-11-24 23:15:06,915 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 [2023-11-24 23:15:06,916 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 [2023-11-24 23:15:06,917 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] [2023-11-24 23:15:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-24 23:15:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-11-24 23:15:06,922 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) [2023-11-24 23:15:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-24 23:15:06,923 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2023-11-24 23:15:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:06,924 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-24 23:15:06,924 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) [2023-11-24 23:15:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-24 23:15:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:15:06,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:06,925 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-24 23:15:06,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:07,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:07,130 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:07,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -431543096, now seen corresponding path program 3 times [2023-11-24 23:15:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:07,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109697432] [2023-11-24 23:15:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:07,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:07,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109697432] [2023-11-24 23:15:07,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109697432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:07,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365469353] [2023-11-24 23:15:07,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:15:07,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:07,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:07,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:07,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:15:07,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:15:07,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:15:07,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 23:15:07,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:07,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:08,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365469353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:08,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [907107865] [2023-11-24 23:15:08,090 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:15:08,090 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:08,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:08,090 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:08,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:15:08,339 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:15:08,868 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 [2023-11-24 23:15:08,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:15:08,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:15:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-24 23:15:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542582041] [2023-11-24 23:15:08,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:15:08,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-24 23:15:08,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:08,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-24 23:15:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 23:15:08,872 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) [2023-11-24 23:15:09,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:09,262 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2023-11-24 23:15:09,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 23:15:09,263 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 [2023-11-24 23:15:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:09,264 INFO L225 Difference]: With dead ends: 46 [2023-11-24 23:15:09,264 INFO L226 Difference]: Without dead ends: 30 [2023-11-24 23:15:09,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=938, Invalid=1714, Unknown=0, NotChecked=0, Total=2652 [2023-11-24 23:15:09,267 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 [2023-11-24 23:15:09,268 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] [2023-11-24 23:15:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-24 23:15:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-11-24 23:15:09,274 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) [2023-11-24 23:15:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-24 23:15:09,275 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2023-11-24 23:15:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:09,276 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-24 23:15:09,276 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) [2023-11-24 23:15:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-24 23:15:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 23:15:09,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:09,278 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-11-24 23:15:09,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:09,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:09,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:09,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1633246600, now seen corresponding path program 4 times [2023-11-24 23:15:09,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:09,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141476889] [2023-11-24 23:15:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:09,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:10,253 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:10,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141476889] [2023-11-24 23:15:10,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141476889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:10,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866457109] [2023-11-24 23:15:10,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 23:15:10,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:10,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:10,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:10,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:15:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:10,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 23:15:10,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:10,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:12,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866457109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1728014497] [2023-11-24 23:15:12,077 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:15:12,077 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:12,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:12,078 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:12,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:15:12,337 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:15:12,941 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 [2023-11-24 23:15:12,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:15:12,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:15:12,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2023-11-24 23:15:12,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510808319] [2023-11-24 23:15:12,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:15:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-24 23:15:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:12,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-24 23:15:12,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=3458, Unknown=0, NotChecked=0, Total=5852 [2023-11-24 23:15:12,951 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) [2023-11-24 23:15:14,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:14,224 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2023-11-24 23:15:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-24 23:15:14,228 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 [2023-11-24 23:15:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:14,231 INFO L225 Difference]: With dead ends: 82 [2023-11-24 23:15:14,232 INFO L226 Difference]: Without dead ends: 54 [2023-11-24 23:15:14,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3590, Invalid=6310, Unknown=0, NotChecked=0, Total=9900 [2023-11-24 23:15:14,239 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 [2023-11-24 23:15:14,239 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] [2023-11-24 23:15:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-24 23:15:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-11-24 23:15:14,253 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) [2023-11-24 23:15:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-11-24 23:15:14,258 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2023-11-24 23:15:14,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:14,259 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-11-24 23:15:14,259 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) [2023-11-24 23:15:14,259 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-11-24 23:15:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:15:14,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:14,262 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2023-11-24 23:15:14,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:14,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:14,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:14,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1554276104, now seen corresponding path program 5 times [2023-11-24 23:15:14,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:14,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579387184] [2023-11-24 23:15:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:14,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:16,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:16,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579387184] [2023-11-24 23:15:16,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579387184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:16,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184623713] [2023-11-24 23:15:16,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:15:16,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:16,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:16,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:16,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:15:16,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-24 23:15:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:15:16,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-24 23:15:16,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:18,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:22,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184623713] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:22,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854052648] [2023-11-24 23:15:22,081 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:15:22,081 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:22,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:22,082 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:22,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:15:22,281 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:15:22,888 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 [2023-11-24 23:15:22,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:15:22,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:15:22,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2023-11-24 23:15:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380019468] [2023-11-24 23:15:22,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:15:22,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2023-11-24 23:15:22,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2023-11-24 23:15:22,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9378, Invalid=12674, Unknown=0, NotChecked=0, Total=22052 [2023-11-24 23:15:22,904 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) [2023-11-24 23:15:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:26,570 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2023-11-24 23:15:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-24 23:15:26,571 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 [2023-11-24 23:15:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:26,572 INFO L225 Difference]: With dead ends: 154 [2023-11-24 23:15:26,572 INFO L226 Difference]: Without dead ends: 102 [2023-11-24 23:15:26,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14429 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=14078, Invalid=24142, Unknown=0, NotChecked=0, Total=38220 [2023-11-24 23:15:26,581 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:26,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 37 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:15:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-24 23:15:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-11-24 23:15:26,596 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) [2023-11-24 23:15:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-11-24 23:15:26,597 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2023-11-24 23:15:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:26,597 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-11-24 23:15:26,598 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) [2023-11-24 23:15:26,598 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-11-24 23:15:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-24 23:15:26,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:26,602 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2023-11-24 23:15:26,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-24 23:15:26,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:15:26,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:26,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:26,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1760239096, now seen corresponding path program 6 times [2023-11-24 23:15:26,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:26,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689284590] [2023-11-24 23:15:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:26,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:33,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:33,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689284590] [2023-11-24 23:15:33,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689284590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:33,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755690823] [2023-11-24 23:15:33,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:15:33,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:33,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:33,754 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:33,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40555f04-8f6d-4c28-b834-1534432b3983/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:15:33,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:15:33,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:15:33,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-24 23:15:33,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:39,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:15:53,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755690823] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:53,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [466630025] [2023-11-24 23:15:53,424 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:15:53,425 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:53,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:53,425 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:53,425 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:15:53,613 INFO L180 IcfgInterpreter]: Interpretation finished