./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-22.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_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/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_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-22.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/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_61fe9a74-8b68-46b0-809c-ea040b582b05/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 f0881add29b2e913dccd0b5d11f581533e2263693d3a446dde3d837a9a510a5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:48:08,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:48:08,918 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:48:08,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:48:08,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:48:08,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:48:08,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:48:08,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:48:08,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:48:08,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:48:08,954 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:48:08,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:48:08,955 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:48:08,956 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:48:08,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:48:08,957 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:48:08,957 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:48:08,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:48:08,958 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:48:08,959 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:48:08,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:48:08,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:48:08,961 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:48:08,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:48:08,962 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:48:08,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:48:08,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:48:08,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:48:08,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:08,964 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:48:08,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:48:08,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:48:08,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:48:08,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:48:08,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:48:08,967 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:48:08,967 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:48:08,968 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:48:08,968 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:48:08,968 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_61fe9a74-8b68-46b0-809c-ea040b582b05/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0881add29b2e913dccd0b5d11f581533e2263693d3a446dde3d837a9a510a5a [2023-11-19 07:48:09,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:48:09,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:48:09,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:48:09,275 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:48:09,275 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:48:09,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-22.i [2023-11-19 07:48:12,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:12,734 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:12,735 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-22.i [2023-11-19 07:48:12,747 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/data/65603f35e/36bb482c9b9543719e1549ad8ac036b9/FLAG55b013444 [2023-11-19 07:48:12,763 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/data/65603f35e/36bb482c9b9543719e1549ad8ac036b9 [2023-11-19 07:48:12,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:12,768 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:12,772 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:12,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:12,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:12,785 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:12" (1/1) ... [2023-11-19 07:48:12,786 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23cecc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:12, skipping insertion in model container [2023-11-19 07:48:12,786 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:12" (1/1) ... [2023-11-19 07:48:12,842 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:12,999 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_61fe9a74-8b68-46b0-809c-ea040b582b05/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-22.i[916,929] [2023-11-19 07:48:13,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:13,112 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:13,123 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_61fe9a74-8b68-46b0-809c-ea040b582b05/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount100_file-22.i[916,929] [2023-11-19 07:48:13,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:13,199 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:13,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13 WrapperNode [2023-11-19 07:48:13,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:13,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:13,217 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:13,218 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:13,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,315 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 254 [2023-11-19 07:48:13,316 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:13,317 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:13,317 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:13,317 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:13,329 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,363 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,369 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,373 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,377 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,386 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:13,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:13,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:13,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:13,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (1/1) ... [2023-11-19 07:48:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:13,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:13,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:13,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:48:13,514 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:48:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:13,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:13,666 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:13,669 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:14,456 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:14,470 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:14,477 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:48:14,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:14 BoogieIcfgContainer [2023-11-19 07:48:14,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:14,488 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:14,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:14,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:14,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:12" (1/3) ... [2023-11-19 07:48:14,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6aeda3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:14, skipping insertion in model container [2023-11-19 07:48:14,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:13" (2/3) ... [2023-11-19 07:48:14,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6aeda3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:14, skipping insertion in model container [2023-11-19 07:48:14,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:14" (3/3) ... [2023-11-19 07:48:14,501 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount100_file-22.i [2023-11-19 07:48:14,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:14,523 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:48:14,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:14,608 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;@cc692d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:14,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:48:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.453125) internal successors, (93), 65 states have internal predecessors, (93), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 07:48:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:48:14,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:14,637 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:14,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:14,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1772796809, now seen corresponding path program 1 times [2023-11-19 07:48:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:14,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236999348] [2023-11-19 07:48:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:14,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:14,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236999348] [2023-11-19 07:48:14,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:48:14,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707639529] [2023-11-19 07:48:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:14,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:14,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:14,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:15,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:48:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:48:15,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2023-11-19 07:48:15,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:15,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707639529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:15,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:15,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:15,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075354029] [2023-11-19 07:48:15,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:15,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:48:15,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:48:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:48:15,558 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.453125) internal successors, (93), 65 states have internal predecessors, (93), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-19 07:48:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:15,636 INFO L93 Difference]: Finished difference Result 189 states and 335 transitions. [2023-11-19 07:48:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:48:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) Word has length 200 [2023-11-19 07:48:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:15,653 INFO L225 Difference]: With dead ends: 189 [2023-11-19 07:48:15,654 INFO L226 Difference]: Without dead ends: 94 [2023-11-19 07:48:15,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 199 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 07:48:15,669 INFO L413 NwaCegarLoop]: 148 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, 148 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 07:48:15,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:15,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-19 07:48:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-19 07:48:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.4098360655737705) internal successors, (86), 61 states have internal predecessors, (86), 31 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 07:48:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 148 transitions. [2023-11-19 07:48:15,746 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 148 transitions. Word has length 200 [2023-11-19 07:48:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:15,747 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 148 transitions. [2023-11-19 07:48:15,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 2 states have call successors, (31) [2023-11-19 07:48:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 148 transitions. [2023-11-19 07:48:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-11-19 07:48:15,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:15,755 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:15,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:48:15,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:15,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:15,983 INFO L85 PathProgramCache]: Analyzing trace with hash -774552885, now seen corresponding path program 1 times [2023-11-19 07:48:15,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:15,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169923283] [2023-11-19 07:48:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:16,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:16,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914111568] [2023-11-19 07:48:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:16,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:16,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:16,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:48:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:16,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:48:16,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 07:48:16,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:16,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:16,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169923283] [2023-11-19 07:48:16,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:16,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914111568] [2023-11-19 07:48:16,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914111568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:16,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:16,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:48:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480929528] [2023-11-19 07:48:16,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:16,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:48:16,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:16,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:48:16,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:16,755 INFO L87 Difference]: Start difference. First operand 94 states and 148 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:48:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:17,022 INFO L93 Difference]: Finished difference Result 306 states and 484 transitions. [2023-11-19 07:48:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:48:17,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 200 [2023-11-19 07:48:17,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:17,029 INFO L225 Difference]: With dead ends: 306 [2023-11-19 07:48:17,030 INFO L226 Difference]: Without dead ends: 215 [2023-11-19 07:48:17,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:17,033 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 255 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:17,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 541 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-19 07:48:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 202. [2023-11-19 07:48:17,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 137 states have (on average 1.437956204379562) internal successors, (197), 137 states have internal predecessors, (197), 62 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-19 07:48:17,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 321 transitions. [2023-11-19 07:48:17,085 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 321 transitions. Word has length 200 [2023-11-19 07:48:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:17,087 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 321 transitions. [2023-11-19 07:48:17,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:48:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 321 transitions. [2023-11-19 07:48:17,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-19 07:48:17,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:17,093 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:17,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:17,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:17,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:17,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash -240940014, now seen corresponding path program 1 times [2023-11-19 07:48:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:17,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091285526] [2023-11-19 07:48:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:17,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:17,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480797881] [2023-11-19 07:48:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:17,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:17,399 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:17,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:48:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:48:17,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 07:48:18,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:18,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:18,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091285526] [2023-11-19 07:48:18,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480797881] [2023-11-19 07:48:18,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480797881] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:18,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:18,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:18,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415581694] [2023-11-19 07:48:18,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:18,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:18,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:18,527 INFO L87 Difference]: Start difference. First operand 202 states and 321 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:48:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:18,785 INFO L93 Difference]: Finished difference Result 521 states and 826 transitions. [2023-11-19 07:48:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 201 [2023-11-19 07:48:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:18,790 INFO L225 Difference]: With dead ends: 521 [2023-11-19 07:48:18,790 INFO L226 Difference]: Without dead ends: 322 [2023-11-19 07:48:18,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:18,793 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 96 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:18,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 402 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-19 07:48:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 300. [2023-11-19 07:48:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 203 states have (on average 1.438423645320197) internal successors, (292), 203 states have internal predecessors, (292), 93 states have call successors, (93), 3 states have call predecessors, (93), 3 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-19 07:48:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 478 transitions. [2023-11-19 07:48:18,847 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 478 transitions. Word has length 201 [2023-11-19 07:48:18,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:18,849 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 478 transitions. [2023-11-19 07:48:18,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:48:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 478 transitions. [2023-11-19 07:48:18,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 07:48:18,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:18,853 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:18,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:19,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:19,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash -241266179, now seen corresponding path program 1 times [2023-11-19 07:48:19,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:19,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475730218] [2023-11-19 07:48:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:19,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:19,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482225798] [2023-11-19 07:48:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:19,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:19,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:19,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:19,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:48:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:48:19,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-19 07:48:20,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:20,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475730218] [2023-11-19 07:48:20,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:20,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482225798] [2023-11-19 07:48:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482225798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:20,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:20,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:20,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080774767] [2023-11-19 07:48:20,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:20,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:20,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:20,096 INFO L87 Difference]: Start difference. First operand 300 states and 478 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:48:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:20,335 INFO L93 Difference]: Finished difference Result 750 states and 1202 transitions. [2023-11-19 07:48:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) Word has length 203 [2023-11-19 07:48:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:20,346 INFO L225 Difference]: With dead ends: 750 [2023-11-19 07:48:20,346 INFO L226 Difference]: Without dead ends: 537 [2023-11-19 07:48:20,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:20,352 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 56 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:20,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 330 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:20,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2023-11-19 07:48:20,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 530. [2023-11-19 07:48:20,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 369 states have (on average 1.4471544715447155) internal successors, (534), 369 states have internal predecessors, (534), 155 states have call successors, (155), 5 states have call predecessors, (155), 5 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2023-11-19 07:48:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 844 transitions. [2023-11-19 07:48:20,445 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 844 transitions. Word has length 203 [2023-11-19 07:48:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:20,448 INFO L495 AbstractCegarLoop]: Abstraction has 530 states and 844 transitions. [2023-11-19 07:48:20,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 1 states have call successors, (31), 1 states have call predecessors, (31), 1 states have return successors, (31), 1 states have call predecessors, (31), 1 states have call successors, (31) [2023-11-19 07:48:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 844 transitions. [2023-11-19 07:48:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-19 07:48:20,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:20,453 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:20,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:20,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:20,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:20,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:20,663 INFO L85 PathProgramCache]: Analyzing trace with hash -828072193, now seen corresponding path program 1 times [2023-11-19 07:48:20,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:20,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900823487] [2023-11-19 07:48:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:20,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:20,705 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:20,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40554799] [2023-11-19 07:48:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:20,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:20,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:20,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:20,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:48:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:20,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 07:48:20,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 839 proven. 48 refuted. 0 times theorem prover too weak. 973 trivial. 0 not checked. [2023-11-19 07:48:22,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2023-11-19 07:48:23,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:23,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900823487] [2023-11-19 07:48:23,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:48:23,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40554799] [2023-11-19 07:48:23,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40554799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:23,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:23,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2023-11-19 07:48:23,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876388830] [2023-11-19 07:48:23,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:23,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:48:23,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:48:23,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:48:23,332 INFO L87 Difference]: Start difference. First operand 530 states and 844 transitions. Second operand has 25 states, 24 states have (on average 4.416666666666667) internal successors, (106), 23 states have internal predecessors, (106), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 6 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 07:48:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:26,300 INFO L93 Difference]: Finished difference Result 1492 states and 2306 transitions. [2023-11-19 07:48:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 07:48:26,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.416666666666667) internal successors, (106), 23 states have internal predecessors, (106), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 6 states have call predecessors, (62), 6 states have call successors, (62) Word has length 203 [2023-11-19 07:48:26,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:26,309 INFO L225 Difference]: With dead ends: 1492 [2023-11-19 07:48:26,309 INFO L226 Difference]: Without dead ends: 1063 [2023-11-19 07:48:26,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=699, Invalid=1463, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 07:48:26,312 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 824 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:26,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 1350 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 07:48:26,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2023-11-19 07:48:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 812. [2023-11-19 07:48:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 572 states have (on average 1.4090909090909092) internal successors, (806), 572 states have internal predecessors, (806), 217 states have call successors, (217), 22 states have call predecessors, (217), 22 states have return successors, (217), 217 states have call predecessors, (217), 217 states have call successors, (217) [2023-11-19 07:48:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1240 transitions. [2023-11-19 07:48:26,448 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1240 transitions. Word has length 203 [2023-11-19 07:48:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:26,449 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1240 transitions. [2023-11-19 07:48:26,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.416666666666667) internal successors, (106), 23 states have internal predecessors, (106), 6 states have call successors, (62), 4 states have call predecessors, (62), 7 states have return successors, (62), 6 states have call predecessors, (62), 6 states have call successors, (62) [2023-11-19 07:48:26,450 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1240 transitions. [2023-11-19 07:48:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-19 07:48:26,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:26,453 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:26,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:26,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:26,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:48:26,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:26,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1458648778, now seen corresponding path program 1 times [2023-11-19 07:48:26,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:26,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366956349] [2023-11-19 07:48:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:26,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:26,719 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:48:26,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278429293] [2023-11-19 07:48:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:26,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:26,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:26,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:26,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61fe9a74-8b68-46b0-809c-ea040b582b05/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:48:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:27,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-19 07:48:27,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 1517 proven. 150 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-11-19 07:48:35,060 INFO L327 TraceCheckSpWp]: Computing backward predicates...