./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/bh2017-ex1-poly.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-lit/bh2017-ex1-poly.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6dbcbf51695ea037a123bcc006ce5f6db095b874a22b169ec869d834ce41de6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:07:46,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:07:47,038 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:07:47,043 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:07:47,043 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:07:47,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:07:47,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:07:47,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:07:47,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:07:47,097 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:07:47,098 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:07:47,099 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:07:47,100 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:07:47,101 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:07:47,101 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:07:47,102 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:07:47,103 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:07:47,103 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:07:47,104 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:07:47,105 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:07:47,106 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:07:47,106 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:07:47,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:07:47,108 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:07:47,109 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:07:47,109 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:07:47,110 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:07:47,110 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:07:47,111 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:07:47,111 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:07:47,112 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:07:47,112 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:07:47,113 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:07:47,113 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:07:47,113 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:07:47,114 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:07:47,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:07:47,115 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:07:47,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:07:47,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:07:47,116 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:07:47,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:07:47,116 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:07:47,117 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:07:47,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:07:47,117 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_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6dbcbf51695ea037a123bcc006ce5f6db095b874a22b169ec869d834ce41de6 [2023-11-12 00:07:47,438 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:07:47,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:07:47,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:07:47,484 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:07:47,484 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:07:47,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/loop-lit/bh2017-ex1-poly.i [2023-11-12 00:07:50,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:07:50,928 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:07:50,929 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/sv-benchmarks/c/loop-lit/bh2017-ex1-poly.i [2023-11-12 00:07:50,937 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/data/a350a6533/f36420f92497451781c0f9e6fe2724ab/FLAGf207cd6a2 [2023-11-12 00:07:50,954 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/data/a350a6533/f36420f92497451781c0f9e6fe2724ab [2023-11-12 00:07:50,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:07:50,964 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:07:50,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:07:50,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:07:50,973 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:07:50,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:07:50" (1/1) ... [2023-11-12 00:07:50,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55f501b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:50, skipping insertion in model container [2023-11-12 00:07:50,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:07:50" (1/1) ... [2023-11-12 00:07:51,000 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:07:51,194 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_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/sv-benchmarks/c/loop-lit/bh2017-ex1-poly.i[804,817] [2023-11-12 00:07:51,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:07:51,219 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:07:51,230 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_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/sv-benchmarks/c/loop-lit/bh2017-ex1-poly.i[804,817] [2023-11-12 00:07:51,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:07:51,251 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:07:51,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51 WrapperNode [2023-11-12 00:07:51,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:07:51,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:07:51,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:07:51,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:07:51,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,290 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2023-11-12 00:07:51,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:07:51,291 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:07:51,291 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:07:51,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:07:51,302 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,311 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,311 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,320 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:07:51,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:07:51,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:07:51,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:07:51,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (1/1) ... [2023-11-12 00:07:51,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:07:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:07:51,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:07:51,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:07:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:07:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:07:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:07:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:07:51,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:07:51,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:07:51,507 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:07:51,510 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:07:51,695 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:07:51,737 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:07:51,743 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:07:51,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:07:51 BoogieIcfgContainer [2023-11-12 00:07:51,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:07:51,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:07:51,752 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:07:51,756 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:07:51,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:07:50" (1/3) ... [2023-11-12 00:07:51,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f0a3def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:07:51, skipping insertion in model container [2023-11-12 00:07:51,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:07:51" (2/3) ... [2023-11-12 00:07:51,759 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f0a3def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:07:51, skipping insertion in model container [2023-11-12 00:07:51,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:07:51" (3/3) ... [2023-11-12 00:07:51,761 INFO L112 eAbstractionObserver]: Analyzing ICFG bh2017-ex1-poly.i [2023-11-12 00:07:51,784 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:07:51,785 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:07:51,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:07:51,868 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;@684fea64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:07:51,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:07:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 8 states have (on average 1.5) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 00:07:51,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:07:51,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:51,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:07:51,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:51,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:51,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1996498557, now seen corresponding path program 1 times [2023-11-12 00:07:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335461348] [2023-11-12 00:07:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:07:52,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:52,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335461348] [2023-11-12 00:07:52,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335461348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:07:52,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:07:52,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:07:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652656211] [2023-11-12 00:07:52,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:07:52,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:07:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:07:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:07:52,370 INFO L87 Difference]: Start difference. First operand has 19 states, 8 states have (on average 1.5) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:07:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:52,559 INFO L93 Difference]: Finished difference Result 42 states and 69 transitions. [2023-11-12 00:07:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:07:52,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:07:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:52,571 INFO L225 Difference]: With dead ends: 42 [2023-11-12 00:07:52,572 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:07:52,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:07:52,580 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:52,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 67 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:07:52,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:07:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-12 00:07:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 00:07:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-11-12 00:07:52,635 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 7 [2023-11-12 00:07:52,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:52,636 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-11-12 00:07:52,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:07:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-11-12 00:07:52,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:07:52,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:52,639 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:07:52,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:07:52,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:52,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:52,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2106031398, now seen corresponding path program 1 times [2023-11-12 00:07:52,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:52,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717273300] [2023-11-12 00:07:52,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:52,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:07:52,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717273300] [2023-11-12 00:07:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717273300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:07:52,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:07:52,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:07:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545603679] [2023-11-12 00:07:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:07:52,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:07:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:07:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:07:52,831 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:07:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:52,941 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-11-12 00:07:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:07:52,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-12 00:07:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:52,944 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:07:52,944 INFO L226 Difference]: Without dead ends: 39 [2023-11-12 00:07:52,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:07:52,946 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:52,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:07:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-12 00:07:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2023-11-12 00:07:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-12 00:07:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 49 transitions. [2023-11-12 00:07:52,964 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 49 transitions. Word has length 12 [2023-11-12 00:07:52,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:52,964 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 49 transitions. [2023-11-12 00:07:52,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:07:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 49 transitions. [2023-11-12 00:07:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:07:52,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:52,966 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:07:52,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:07:52,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:52,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2121220317, now seen corresponding path program 1 times [2023-11-12 00:07:52,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:52,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654787576] [2023-11-12 00:07:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:07:53,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654787576] [2023-11-12 00:07:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654787576] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:07:53,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:07:53,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:07:53,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229853287] [2023-11-12 00:07:53,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:07:53,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:07:53,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:53,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:07:53,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:07:53,192 INFO L87 Difference]: Start difference. First operand 36 states and 49 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:07:53,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:53,303 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2023-11-12 00:07:53,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:07:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-12 00:07:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:53,305 INFO L225 Difference]: With dead ends: 45 [2023-11-12 00:07:53,306 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 00:07:53,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:07:53,308 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:53,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 81 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:07:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 00:07:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-11-12 00:07:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 00:07:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2023-11-12 00:07:53,345 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 17 [2023-11-12 00:07:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:53,347 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2023-11-12 00:07:53,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-12 00:07:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2023-11-12 00:07:53,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-12 00:07:53,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:53,349 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:07:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:07:53,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:53,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:53,357 INFO L85 PathProgramCache]: Analyzing trace with hash 905923334, now seen corresponding path program 1 times [2023-11-12 00:07:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:53,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958791693] [2023-11-12 00:07:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:53,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:07:53,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:53,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958791693] [2023-11-12 00:07:53,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958791693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:07:53,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:07:53,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:07:53,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215887419] [2023-11-12 00:07:53,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:07:53,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:07:53,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:53,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:07:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:07:53,541 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 00:07:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:53,647 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2023-11-12 00:07:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:07:53,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-11-12 00:07:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:53,651 INFO L225 Difference]: With dead ends: 88 [2023-11-12 00:07:53,653 INFO L226 Difference]: Without dead ends: 55 [2023-11-12 00:07:53,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:07:53,657 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:53,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:07:53,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-12 00:07:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-12 00:07:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:07:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 75 transitions. [2023-11-12 00:07:53,699 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 75 transitions. Word has length 22 [2023-11-12 00:07:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:53,700 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 75 transitions. [2023-11-12 00:07:53,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 00:07:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 75 transitions. [2023-11-12 00:07:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 00:07:53,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:53,704 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 00:07:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:07:53,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:53,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1205745070, now seen corresponding path program 1 times [2023-11-12 00:07:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:53,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512416295] [2023-11-12 00:07:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-12 00:07:53,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512416295] [2023-11-12 00:07:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512416295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:07:53,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:07:53,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:07:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309200299] [2023-11-12 00:07:53,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:07:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:07:53,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:53,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:07:53,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:07:53,853 INFO L87 Difference]: Start difference. First operand 55 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:07:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:53,937 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2023-11-12 00:07:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:07:53,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-11-12 00:07:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:53,940 INFO L225 Difference]: With dead ends: 61 [2023-11-12 00:07:53,941 INFO L226 Difference]: Without dead ends: 59 [2023-11-12 00:07:53,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:07:53,943 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:53,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:07:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-12 00:07:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-12 00:07:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 23 states have call successors, (23), 6 states have call predecessors, (23), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:07:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 78 transitions. [2023-11-12 00:07:53,966 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 78 transitions. Word has length 43 [2023-11-12 00:07:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:53,967 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 78 transitions. [2023-11-12 00:07:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:07:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 78 transitions. [2023-11-12 00:07:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-12 00:07:53,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:53,972 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:07:53,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:07:53,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:53,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1658245807, now seen corresponding path program 1 times [2023-11-12 00:07:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:53,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040815960] [2023-11-12 00:07:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-12 00:07:54,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:54,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040815960] [2023-11-12 00:07:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040815960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:07:54,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956426160] [2023-11-12 00:07:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:54,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:07:54,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:07:54,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:07:54,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:07:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:54,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 00:07:54,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:07:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 33 proven. 8 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-12 00:07:54,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:07:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-12 00:07:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956426160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:07:55,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1665091676] [2023-11-12 00:07:55,417 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-11-12 00:07:55,417 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:07:55,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:07:55,427 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:07:55,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:07:56,905 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-12 00:07:56,910 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:07:57,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1334#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-12 00:07:57,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:07:57,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:07:57,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 11] total 24 [2023-11-12 00:07:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146206472] [2023-11-12 00:07:57,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:07:57,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:07:57,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:07:57,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:07:57,419 INFO L87 Difference]: Start difference. First operand 59 states and 78 transitions. Second operand has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 11 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2023-11-12 00:07:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:57,782 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2023-11-12 00:07:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 00:07:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 11 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 77 [2023-11-12 00:07:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:57,789 INFO L225 Difference]: With dead ends: 79 [2023-11-12 00:07:57,789 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 00:07:57,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 200 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:07:57,796 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 10 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:57,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 180 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:07:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 00:07:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2023-11-12 00:07:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 23 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:07:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2023-11-12 00:07:57,815 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 77 [2023-11-12 00:07:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:57,815 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2023-11-12 00:07:57,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 11 states have call successors, (41), 3 states have call predecessors, (41), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2023-11-12 00:07:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2023-11-12 00:07:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-12 00:07:57,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:07:57,826 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:07:57,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:07:58,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:07:58,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:07:58,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:07:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1663209000, now seen corresponding path program 2 times [2023-11-12 00:07:58,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:07:58,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837387488] [2023-11-12 00:07:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:07:58,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:07:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:07:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2023-11-12 00:07:58,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:07:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837387488] [2023-11-12 00:07:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837387488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:07:58,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:07:58,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:07:58,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601626515] [2023-11-12 00:07:58,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:07:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:07:58,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:07:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:07:58,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:07:58,198 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:07:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:07:58,272 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2023-11-12 00:07:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:07:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 82 [2023-11-12 00:07:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:07:58,274 INFO L225 Difference]: With dead ends: 67 [2023-11-12 00:07:58,274 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:07:58,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:07:58,276 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:07:58,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 67 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:07:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:07:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:07:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:07:58,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:07:58,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2023-11-12 00:07:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:07:58,277 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:07:58,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-12 00:07:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:07:58,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:07:58,280 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:07:58,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:07:58,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-12 00:07:58,751 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-12 00:07:58,752 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2023-11-12 00:07:58,752 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and .cse0 (<= .cse1 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|)) (and (<= 3 |ULTIMATE.start_main_~j~0#1|) .cse0 (<= .cse1 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse1)))) [2023-11-12 00:07:58,752 INFO L895 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and (= 2 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~i~0#1| 1)) (and .cse0 (<= .cse1 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse1)) (and .cse0 (= |ULTIMATE.start_main_~j~0#1| .cse1) (<= 2 |ULTIMATE.start_main_~i~0#1|)))) [2023-11-12 00:07:58,752 INFO L895 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and (= 2 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~i~0#1| 1)) (and .cse0 (<= .cse1 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse1)) (and .cse0 (= |ULTIMATE.start_main_~j~0#1| .cse1) (<= 2 |ULTIMATE.start_main_~i~0#1|)))) [2023-11-12 00:07:58,752 INFO L895 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and (= 2 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~i~0#1| 1)) (and .cse0 (<= .cse1 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse1)) (and .cse0 (= |ULTIMATE.start_main_~j~0#1| .cse1) (<= 2 |ULTIMATE.start_main_~i~0#1|)))) [2023-11-12 00:07:58,752 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-12 00:07:58,753 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (and (<= 3 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 4) (<= (* 2 |ULTIMATE.start_main_~i~0#1|) (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= 2 |ULTIMATE.start_main_~i~0#1|)) [2023-11-12 00:07:58,753 INFO L895 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and .cse0 (= |ULTIMATE.start_main_~j~0#1| .cse1) (<= 2 |ULTIMATE.start_main_~i~0#1|)) (and (<= 3 |ULTIMATE.start_main_~j~0#1|) .cse0 (<= .cse1 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse1)))) [2023-11-12 00:07:58,753 INFO L895 garLoopResultBuilder]: At program point L24(lines 18 25) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~j~0#1| 0)) (.cse1 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse2 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and (= 2 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~i~0#1| 1)) (and (= |ULTIMATE.start_main_~i~0#1| 0) .cse0) (and .cse1 (<= .cse2 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse2)) (and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 3) .cse0) (and .cse1 (= |ULTIMATE.start_main_~j~0#1| .cse2) (<= 2 |ULTIMATE.start_main_~i~0#1|)))) [2023-11-12 00:07:58,753 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and (= 2 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_main_~i~0#1| 1)) (and .cse0 (<= .cse1 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= 2 |ULTIMATE.start_main_~j~0#1|) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse1)) (and .cse0 (= |ULTIMATE.start_main_~j~0#1| .cse1) (<= 2 |ULTIMATE.start_main_~i~0#1|)))) [2023-11-12 00:07:58,753 INFO L895 garLoopResultBuilder]: At program point L18-2(lines 18 25) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~j~0#1| 4)) (.cse1 (* 2 |ULTIMATE.start_main_~i~0#1|))) (or (and .cse0 (= |ULTIMATE.start_main_~j~0#1| .cse1) (<= 2 |ULTIMATE.start_main_~i~0#1|)) (and (<= 3 |ULTIMATE.start_main_~j~0#1|) .cse0 (<= .cse1 (+ 6 |ULTIMATE.start_main_~j~0#1|)) (<= (+ 2 |ULTIMATE.start_main_~j~0#1|) .cse1)))) [2023-11-12 00:07:58,753 INFO L895 garLoopResultBuilder]: At program point L16-2(lines 16 31) the Hoare annotation is: (or (< 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0)) [2023-11-12 00:07:58,753 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2023-11-12 00:07:58,754 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-11-12 00:07:58,754 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2023-11-12 00:07:58,754 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(line 13) no Hoare annotation was computed. [2023-11-12 00:07:58,754 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line 13) the Hoare annotation is: true [2023-11-12 00:07:58,754 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2023-11-12 00:07:58,757 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-12 00:07:58,759 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:07:58,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:07:58 BoogieIcfgContainer [2023-11-12 00:07:58,773 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:07:58,773 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:07:58,774 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:07:58,774 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:07:58,774 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:07:51" (3/4) ... [2023-11-12 00:07:58,777 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 00:07:58,780 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-12 00:07:58,784 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-11-12 00:07:58,785 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2023-11-12 00:07:58,785 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-12 00:07:58,785 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 00:07:58,874 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:07:58,875 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/witness.yml [2023-11-12 00:07:58,875 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:07:58,876 INFO L158 Benchmark]: Toolchain (without parser) took 7911.76ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 144.8MB in the beginning and 100.7MB in the end (delta: 44.1MB). Peak memory consumption was 84.5MB. Max. memory is 16.1GB. [2023-11-12 00:07:58,876 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 68.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:07:58,876 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.24ms. Allocated memory is still 184.5MB. Free memory was 144.3MB in the beginning and 134.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:07:58,877 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.42ms. Allocated memory is still 184.5MB. Free memory was 134.3MB in the beginning and 132.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:07:58,877 INFO L158 Benchmark]: Boogie Preprocessor took 32.70ms. Allocated memory is still 184.5MB. Free memory was 132.8MB in the beginning and 131.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:07:58,878 INFO L158 Benchmark]: RCFGBuilder took 422.52ms. Allocated memory is still 184.5MB. Free memory was 131.7MB in the beginning and 121.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:07:58,878 INFO L158 Benchmark]: TraceAbstraction took 7020.91ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 120.2MB in the beginning and 105.9MB in the end (delta: 14.3MB). Peak memory consumption was 53.0MB. Max. memory is 16.1GB. [2023-11-12 00:07:58,879 INFO L158 Benchmark]: Witness Printer took 101.64ms. Allocated memory is still 222.3MB. Free memory was 104.9MB in the beginning and 100.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 00:07:58,881 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 68.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 285.24ms. Allocated memory is still 184.5MB. Free memory was 144.3MB in the beginning and 134.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.42ms. Allocated memory is still 184.5MB. Free memory was 134.3MB in the beginning and 132.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.70ms. Allocated memory is still 184.5MB. Free memory was 132.8MB in the beginning and 131.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 422.52ms. Allocated memory is still 184.5MB. Free memory was 131.7MB in the beginning and 121.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7020.91ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 120.2MB in the beginning and 105.9MB in the end (delta: 14.3MB). Peak memory consumption was 53.0MB. Max. memory is 16.1GB. * Witness Printer took 101.64ms. Allocated memory is still 222.3MB. Free memory was 104.9MB in the beginning and 100.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.9s, OverallIterations: 7, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 77 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41 mSDsluCounter, 632 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 471 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 554 IncrementalHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 161 mSDtfsCounter, 554 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 212 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=6, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 52 PreInvPairs, 83 NumberOfFragments, 349 HoareAnnotationTreeSize, 52 FomulaSimplifications, 650 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 112 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 337 NumberOfCodeBlocks, 337 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 405 ConstructedInterpolants, 0 QuantifiedInterpolants, 1021 SizeOfPredicates, 1 NumberOfNonLiveVariables, 169 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 1573/1599 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((0 < i) || (i == 0)) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((2 == j) && (i == 1)) || ((i == 0) && (j == 0))) || ((((j <= 4) && ((2 * i) <= (6 + j))) && (2 <= j)) && ((2 + j) <= (2 * i)))) || (((1 <= i) && (i <= 3)) && (j == 0))) || (((j <= 4) && (j == (2 * i))) && (2 <= i))) RESULT: Ultimate proved your program to be correct! [2023-11-12 00:07:58,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5cf0b4a9-2f71-4ac0-b66c-73166fbf265a/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE