./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pipeline.cil-1.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_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/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_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/pipeline.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/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_450f573c-244b-4ba0-aa3e-250d01640de8/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 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:10:53,987 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:10:54,058 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:10:54,064 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:10:54,064 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:10:54,115 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:10:54,115 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:10:54,116 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:10:54,117 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:10:54,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:10:54,122 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:10:54,123 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:10:54,123 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:10:54,125 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:10:54,125 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:10:54,125 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:10:54,126 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:10:54,126 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:10:54,127 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:10:54,127 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:10:54,127 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:10:54,128 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:10:54,129 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:10:54,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:10:54,131 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:10:54,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:10:54,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:10:54,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:10:54,133 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:10:54,133 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:10:54,134 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:10:54,135 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:10:54,135 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:10:54,135 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:10:54,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:10:54,136 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:10:54,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:10:54,136 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:10:54,136 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:10:54,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:10:54,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:10:54,141 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:10:54,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:10:54,142 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:10:54,142 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:10:54,142 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:10:54,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:10:54,143 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_450f573c-244b-4ba0-aa3e-250d01640de8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79bbe68806c3ba3852cd8c209d4ce80dca551636a131cc65daaf97524d927c63 [2023-11-25 00:10:54,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:10:54,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:10:54,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:10:54,410 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:10:54,410 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:10:54,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/systemc/pipeline.cil-1.c [2023-11-25 00:10:57,647 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:10:57,910 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:10:57,911 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/sv-benchmarks/c/systemc/pipeline.cil-1.c [2023-11-25 00:10:57,923 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/data/752fbb25f/d15c7edce5244a7db99f22124cbd53f7/FLAGf5704597e [2023-11-25 00:10:57,939 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/data/752fbb25f/d15c7edce5244a7db99f22124cbd53f7 [2023-11-25 00:10:57,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:10:57,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:10:57,945 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:10:57,945 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:10:57,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:10:57,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:10:57" (1/1) ... [2023-11-25 00:10:57,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14868265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:57, skipping insertion in model container [2023-11-25 00:10:57,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:10:57" (1/1) ... [2023-11-25 00:10:58,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:10:58,175 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_450f573c-244b-4ba0-aa3e-250d01640de8/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2023-11-25 00:10:58,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:10:58,289 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:10:58,302 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_450f573c-244b-4ba0-aa3e-250d01640de8/sv-benchmarks/c/systemc/pipeline.cil-1.c[640,653] [2023-11-25 00:10:58,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:10:58,370 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:10:58,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58 WrapperNode [2023-11-25 00:10:58,371 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:10:58,372 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:10:58,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:10:58,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:10:58,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,459 INFO L138 Inliner]: procedures = 20, calls = 17, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 426 [2023-11-25 00:10:58,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:10:58,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:10:58,466 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:10:58,466 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:10:58,477 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,502 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,535 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:10:58,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:10:58,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:10:58,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:10:58,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (1/1) ... [2023-11-25 00:10:58,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:10:58,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:10:58,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:10:58,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:10:58,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:10:58,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:10:58,647 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-11-25 00:10:58,647 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-11-25 00:10:58,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:10:58,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:10:58,775 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:10:58,778 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:10:59,578 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:11:00,209 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:11:00,210 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-25 00:11:00,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:11:00 BoogieIcfgContainer [2023-11-25 00:11:00,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:11:00,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:11:00,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:11:00,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:11:00,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:10:57" (1/3) ... [2023-11-25 00:11:00,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7002fc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:11:00, skipping insertion in model container [2023-11-25 00:11:00,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:10:58" (2/3) ... [2023-11-25 00:11:00,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7002fc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:11:00, skipping insertion in model container [2023-11-25 00:11:00,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:11:00" (3/3) ... [2023-11-25 00:11:00,220 INFO L112 eAbstractionObserver]: Analyzing ICFG pipeline.cil-1.c [2023-11-25 00:11:00,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:11:00,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:11:00,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:11:00,291 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;@35c2a442, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:11:00,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:11:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:11:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-25 00:11:00,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:11:00,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:11:00,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:11:00,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:11:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1828699382, now seen corresponding path program 1 times [2023-11-25 00:11:00,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:11:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961040510] [2023-11-25 00:11:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:11:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:11:00,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:11:00,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961040510] [2023-11-25 00:11:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961040510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:11:00,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279257269] [2023-11-25 00:11:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:00,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:11:00,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:11:00,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:11:00,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:11:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:01,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-25 00:11:01,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:11:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-25 00:11:01,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:11:01,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279257269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:11:01,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:11:01,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-11-25 00:11:01,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652589385] [2023-11-25 00:11:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:11:01,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-25 00:11:01,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:11:01,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-25 00:11:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:11:01,130 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 26 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-25 00:11:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:11:01,187 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2023-11-25 00:11:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-25 00:11:01,190 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-25 00:11:01,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:11:01,198 INFO L225 Difference]: With dead ends: 57 [2023-11-25 00:11:01,198 INFO L226 Difference]: Without dead ends: 29 [2023-11-25 00:11:01,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:11:01,205 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:11:01,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:11:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-25 00:11:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-25 00:11:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-25 00:11:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2023-11-25 00:11:01,245 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 16 [2023-11-25 00:11:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:11:01,246 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2023-11-25 00:11:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-25 00:11:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2023-11-25 00:11:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-25 00:11:01,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:11:01,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:11:01,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:11:01,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:11:01,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:11:01,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:11:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash -88336014, now seen corresponding path program 1 times [2023-11-25 00:11:01,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:11:01,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839593620] [2023-11-25 00:11:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:01,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:11:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:11:03,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:11:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839593620] [2023-11-25 00:11:03,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839593620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:11:03,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756257498] [2023-11-25 00:11:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:03,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:11:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:11:03,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:11:03,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:11:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:03,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-25 00:11:03,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:11:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-25 00:11:03,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:11:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756257498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:11:03,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:11:03,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 13 [2023-11-25 00:11:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172223485] [2023-11-25 00:11:03,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:11:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-25 00:11:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:11:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-25 00:11:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:11:03,595 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:11:03,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:11:03,673 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2023-11-25 00:11:03,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-25 00:11:03,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2023-11-25 00:11:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:11:03,677 INFO L225 Difference]: With dead ends: 67 [2023-11-25 00:11:03,678 INFO L226 Difference]: Without dead ends: 40 [2023-11-25 00:11:03,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-25 00:11:03,681 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:11:03,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-25 00:11:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-25 00:11:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-11-25 00:11:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 29 states have internal predecessors, (40), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-25 00:11:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 50 transitions. [2023-11-25 00:11:03,707 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 50 transitions. Word has length 40 [2023-11-25 00:11:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:11:03,708 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 50 transitions. [2023-11-25 00:11:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-25 00:11:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 50 transitions. [2023-11-25 00:11:03,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-25 00:11:03,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:11:03,715 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:11:03,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-25 00:11:03,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:11:03,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:11:03,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:11:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1229059762, now seen corresponding path program 1 times [2023-11-25 00:11:03,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:11:03,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879233957] [2023-11-25 00:11:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:03,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:11:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 2 proven. 79 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-25 00:11:06,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:11:06,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879233957] [2023-11-25 00:11:06,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879233957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:11:06,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472868417] [2023-11-25 00:11:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:11:06,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:11:06,235 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:11:06,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:11:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:06,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-25 00:11:06,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:11:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-25 00:11:06,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:11:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-25 00:11:06,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472868417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:11:06,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759156829] [2023-11-25 00:11:06,928 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-11-25 00:11:06,928 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:11:06,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:11:06,939 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:11:06,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:11:14,360 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 1 for LOIs [2023-11-25 00:11:14,746 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-25 00:11:16,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (<= 1 |#StackHeapBarrier|) (= ~S3_zero_i~0 0) (= 5 |ULTIMATE.start_main_~count~0#1|) (= ~S2_presdbl_i~0 0) (= ~D_print_i~0 0) (= ~main_clk_val_t~0 1) (= ~N_generate_i~0 0) (= ~D_z~0 0) (= ~S1_addsub_i~0 0))' at error location [2023-11-25 00:11:16,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-25 00:11:16,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-25 00:11:16,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 16 [2023-11-25 00:11:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999999997] [2023-11-25 00:11:16,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-25 00:11:16,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-25 00:11:16,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:11:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-25 00:11:16,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2023-11-25 00:11:16,283 INFO L87 Difference]: Start difference. First operand 35 states and 50 transitions. Second operand has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-25 00:11:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:11:17,084 INFO L93 Difference]: Finished difference Result 131 states and 204 transitions. [2023-11-25 00:11:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-25 00:11:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 78 [2023-11-25 00:11:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:11:17,092 INFO L225 Difference]: With dead ends: 131 [2023-11-25 00:11:17,092 INFO L226 Difference]: Without dead ends: 98 [2023-11-25 00:11:17,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2023-11-25 00:11:17,100 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 199 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-25 00:11:17,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 298 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-25 00:11:17,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-25 00:11:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2023-11-25 00:11:17,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.44) internal successors, (108), 77 states have internal predecessors, (108), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2023-11-25 00:11:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 142 transitions. [2023-11-25 00:11:17,137 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 142 transitions. Word has length 78 [2023-11-25 00:11:17,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:11:17,138 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 142 transitions. [2023-11-25 00:11:17,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-25 00:11:17,138 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 142 transitions. [2023-11-25 00:11:17,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-25 00:11:17,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:11:17,144 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:11:17,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-25 00:11:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:11:17,353 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:11:17,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:11:17,354 INFO L85 PathProgramCache]: Analyzing trace with hash -720751946, now seen corresponding path program 1 times [2023-11-25 00:11:17,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:11:17,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194568404] [2023-11-25 00:11:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:17,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:11:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 27 proven. 475 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-25 00:11:23,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:11:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194568404] [2023-11-25 00:11:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194568404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:11:23,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860027369] [2023-11-25 00:11:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:11:23,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:11:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:11:23,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:11:23,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_450f573c-244b-4ba0-aa3e-250d01640de8/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-25 00:11:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:11:24,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-25 00:11:24,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:11:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 492 proven. 16 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2023-11-25 00:11:25,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:11:37,120 WARN L293 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 306 DAG size of output: 52 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-11-25 00:11:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 96 proven. 208 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-11-25 00:11:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860027369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:11:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186488971] [2023-11-25 00:11:37,547 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-11-25 00:11:37,547 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:11:37,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:11:37,548 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:11:37,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:11:42,316 INFO L197 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 1 for LOIs [2023-11-25 00:11:42,744 INFO L180 IcfgInterpreter]: Interpretation finished