./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/divbin.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/divbin.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:46:48,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:46:48,436 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:46:48,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:46:48,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:46:48,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:46:48,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:46:48,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:46:48,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:46:48,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:46:48,489 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:46:48,489 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:46:48,490 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:46:48,490 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:46:48,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:46:48,491 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:46:48,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:46:48,492 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:46:48,493 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:46:48,493 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:46:48,494 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:46:48,494 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:46:48,495 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:46:48,495 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:46:48,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:46:48,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:46:48,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:46:48,498 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:46:48,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:48,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:46:48,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:46:48,500 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:46:48,501 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:46:48,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:46:48,501 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:46:48,502 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:46:48,502 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:46:48,502 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:46:48,502 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:46:48,503 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c49641164907d0e2939c5443b0376a8e4377b34a58fd804ad01c6cf7d42c55dc [2023-11-19 07:46:48,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:46:48,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:46:48,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:46:48,800 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:46:48,801 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:46:48,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/nla-digbench/divbin.i [2023-11-19 07:46:51,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:46:52,228 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:46:52,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/sv-benchmarks/c/nla-digbench/divbin.i [2023-11-19 07:46:52,237 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/data/2ced60480/d5c5ca6949c24479911262ec4807121e/FLAG4bbf2dca0 [2023-11-19 07:46:52,253 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/data/2ced60480/d5c5ca6949c24479911262ec4807121e [2023-11-19 07:46:52,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:46:52,258 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:46:52,260 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:52,260 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:46:52,266 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:46:52,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661450c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52, skipping insertion in model container [2023-11-19 07:46:52,268 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,291 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:46:52,454 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_281d60ce-419d-4b06-b101-9704fc6ceb20/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2023-11-19 07:46:52,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:52,483 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:46:52,497 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_281d60ce-419d-4b06-b101-9704fc6ceb20/sv-benchmarks/c/nla-digbench/divbin.i[950,963] [2023-11-19 07:46:52,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:46:52,520 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:46:52,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52 WrapperNode [2023-11-19 07:46:52,520 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:46:52,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:52,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:46:52,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:46:52,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,557 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 46 [2023-11-19 07:46:52,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:46:52,558 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:46:52,558 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:46:52,559 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:46:52,568 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,571 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,578 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:46:52,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:46:52,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:46:52,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:46:52,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (1/1) ... [2023-11-19 07:46:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:46:52,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:52,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:46:52,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:46:52,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:46:52,666 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:46:52,666 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:46:52,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:46:52,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:46:52,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:46:52,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 07:46:52,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 07:46:52,734 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:46:52,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:46:52,880 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:46:52,889 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:46:52,889 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:46:52,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:52 BoogieIcfgContainer [2023-11-19 07:46:52,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:46:52,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:46:52,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:46:52,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:46:52,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:46:52" (1/3) ... [2023-11-19 07:46:52,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5bc471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:52, skipping insertion in model container [2023-11-19 07:46:52,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:52" (2/3) ... [2023-11-19 07:46:52,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5bc471 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:52, skipping insertion in model container [2023-11-19 07:46:52,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:52" (3/3) ... [2023-11-19 07:46:52,904 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin.i [2023-11-19 07:46:52,926 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:46:52,926 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:46:52,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:46:52,986 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=PETRI_NET, 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;@5694b313, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:46:52,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:46:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:46:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:46:52,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:52,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:53,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:53,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1977894454, now seen corresponding path program 1 times [2023-11-19 07:46:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:53,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607318191] [2023-11-19 07:46:53,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:53,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:53,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:53,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607318191] [2023-11-19 07:46:53,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:46:53,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912790367] [2023-11-19 07:46:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:53,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:53,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:53,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:46:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:53,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:46:53,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:46:53,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912790367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:53,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:53,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:46:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661794249] [2023-11-19 07:46:53,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:53,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:46:53,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:46:53,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:46:53,430 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:46:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:53,454 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2023-11-19 07:46:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:46:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-19 07:46:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:53,462 INFO L225 Difference]: With dead ends: 49 [2023-11-19 07:46:53,462 INFO L226 Difference]: Without dead ends: 22 [2023-11-19 07:46:53,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:46:53,470 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:53,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:46:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-19 07:46:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-19 07:46:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:46:53,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-19 07:46:53,512 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2023-11-19 07:46:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:53,513 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-19 07:46:53,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:46:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-19 07:46:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 07:46:53,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:53,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:53,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:46:53,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:53,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1409334960, now seen corresponding path program 1 times [2023-11-19 07:46:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:53,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510824560] [2023-11-19 07:46:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:53,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:53,757 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:53,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488732100] [2023-11-19 07:46:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:53,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:53,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:53,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:53,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:46:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:53,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:46:53,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:46:53,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:53,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:53,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510824560] [2023-11-19 07:46:53,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:53,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488732100] [2023-11-19 07:46:53,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488732100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:53,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:53,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:46:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010831427] [2023-11-19 07:46:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:46:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:46:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:46:53,956 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 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) [2023-11-19 07:46:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:54,068 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2023-11-19 07:46:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:46:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 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 20 [2023-11-19 07:46:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:54,071 INFO L225 Difference]: With dead ends: 33 [2023-11-19 07:46:54,071 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 07:46:54,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:46:54,073 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:54,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:46:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 07:46:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-19 07:46:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:46:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-19 07:46:54,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2023-11-19 07:46:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:54,086 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-19 07:46:54,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 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) [2023-11-19 07:46:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-19 07:46:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:46:54,088 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:54,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:54,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:46:54,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:54,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:54,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:54,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1056631181, now seen corresponding path program 1 times [2023-11-19 07:46:54,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:54,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445875263] [2023-11-19 07:46:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:54,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:54,330 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:54,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624182049] [2023-11-19 07:46:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:54,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:54,341 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:54,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:46:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:54,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:46:54,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:46:54,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:46:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:46:54,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445875263] [2023-11-19 07:46:54,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:46:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624182049] [2023-11-19 07:46:54,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624182049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:46:54,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:46:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:46:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754999536] [2023-11-19 07:46:54,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:46:54,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:46:54,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:46:54,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:46:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:46:54,670 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:46:54,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:46:54,770 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-11-19 07:46:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:46:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2023-11-19 07:46:54,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:46:54,773 INFO L225 Difference]: With dead ends: 54 [2023-11-19 07:46:54,774 INFO L226 Difference]: Without dead ends: 32 [2023-11-19 07:46:54,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:46:54,779 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:46:54,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 72 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:46:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-19 07:46:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-19 07:46:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:46:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-19 07:46:54,819 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 28 [2023-11-19 07:46:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:46:54,820 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-19 07:46:54,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:46:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-19 07:46:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 07:46:54,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:46:54,823 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:46:54,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:46:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:55,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:46:55,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:46:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash -444407410, now seen corresponding path program 1 times [2023-11-19 07:46:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:46:55,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562284093] [2023-11-19 07:46:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:55,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:46:55,046 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:46:55,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634433709] [2023-11-19 07:46:55,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:46:55,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:46:55,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:46:55,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:46:55,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:46:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:46:55,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:46:55,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:46:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:46:55,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:02,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562284093] [2023-11-19 07:47:02,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:02,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634433709] [2023-11-19 07:47:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634433709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:47:02,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:47:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-19 07:47:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497308065] [2023-11-19 07:47:02,631 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:02,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:47:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:47:02,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=100, Unknown=3, NotChecked=0, Total=132 [2023-11-19 07:47:02,633 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:47:02,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:02,754 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-19 07:47:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:47:02,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-19 07:47:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:02,756 INFO L225 Difference]: With dead ends: 42 [2023-11-19 07:47:02,756 INFO L226 Difference]: Without dead ends: 39 [2023-11-19 07:47:02,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=40, Invalid=139, Unknown=3, NotChecked=0, Total=182 [2023-11-19 07:47:02,758 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:02,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 107 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:47:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-19 07:47:02,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-19 07:47:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:47:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-19 07:47:02,767 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 30 [2023-11-19 07:47:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:02,768 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-19 07:47:02,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:47:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-19 07:47:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:47:02,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:02,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:02,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:02,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-19 07:47:02,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:02,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1971034289, now seen corresponding path program 2 times [2023-11-19 07:47:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:02,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486576082] [2023-11-19 07:47:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:02,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:03,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:03,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665061153] [2023-11-19 07:47:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:47:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:03,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:03,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:47:03,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:47:03,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:03,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:47:03,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:47:03,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:47:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:47:04,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:47:04,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486576082] [2023-11-19 07:47:04,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:47:04,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665061153] [2023-11-19 07:47:04,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665061153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:47:04,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:47:04,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2023-11-19 07:47:04,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425884708] [2023-11-19 07:47:04,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:47:04,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:47:04,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:47:04,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:47:04,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:47:04,253 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-19 07:47:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:47:04,927 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2023-11-19 07:47:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:47:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 38 [2023-11-19 07:47:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:47:04,928 INFO L225 Difference]: With dead ends: 77 [2023-11-19 07:47:04,929 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 07:47:04,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-11-19 07:47:04,930 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:47:04,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 136 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:47:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 07:47:04,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-11-19 07:47:04,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:47:04,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-19 07:47:04,947 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 38 [2023-11-19 07:47:04,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:47:04,948 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-19 07:47:04,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-19 07:47:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-19 07:47:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 07:47:04,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:47:04,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:47:04,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:47:05,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:05,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:47:05,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:47:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash -275350004, now seen corresponding path program 3 times [2023-11-19 07:47:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:47:05,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519775520] [2023-11-19 07:47:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:47:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:47:05,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:47:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900218871] [2023-11-19 07:47:05,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:47:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:47:05,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:47:05,197 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:47:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_281d60ce-419d-4b06-b101-9704fc6ceb20/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:47:05,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:47:05,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:47:05,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-19 07:47:05,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:47:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:47:18,302 INFO L327 TraceCheckSpWp]: Computing backward predicates...