./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-98.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-98.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 a20160bba21687cb57a07e35d1c7f0f20f9fc26125afd436a393ae4b40571e89 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:14:38,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:14:38,366 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:14:38,372 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:14:38,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:14:38,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:14:38,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:14:38,406 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:14:38,406 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:14:38,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:14:38,408 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:14:38,409 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:14:38,409 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:14:38,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:14:38,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:14:38,411 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:14:38,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:14:38,413 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:14:38,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:14:38,414 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:14:38,415 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:14:38,416 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:14:38,416 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:14:38,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:14:38,418 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:14:38,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:14:38,419 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:14:38,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:14:38,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:38,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:14:38,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:14:38,422 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:14:38,422 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:14:38,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:14:38,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:14:38,425 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:14:38,425 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:14:38,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:14:38,426 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:14:38,426 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_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a20160bba21687cb57a07e35d1c7f0f20f9fc26125afd436a393ae4b40571e89 [2023-11-06 21:14:38,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:14:38,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:14:38,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:14:38,764 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:14:38,764 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:14:38,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-98.i [2023-11-06 21:14:42,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:14:42,404 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:14:42,405 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-98.i [2023-11-06 21:14:42,430 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/data/5cf7cff88/e36213a996e944c196066d1b146b1f4a/FLAG48f5697be [2023-11-06 21:14:42,448 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/data/5cf7cff88/e36213a996e944c196066d1b146b1f4a [2023-11-06 21:14:42,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:14:42,454 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:14:42,455 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:42,455 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:14:42,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:14:42,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a73c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:42, skipping insertion in model container [2023-11-06 21:14:42,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:14:42" (1/1) ... [2023-11-06 21:14:42,559 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:14:42,713 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_cb276ff3-5baf-45e4-8461-27256ef27125/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-98.i[916,929] [2023-11-06 21:14:42,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:43,007 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:14:43,035 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_cb276ff3-5baf-45e4-8461-27256ef27125/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-98.i[916,929] [2023-11-06 21:14:43,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:14:43,306 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:14:43,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43 WrapperNode [2023-11-06 21:14:43,306 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:14:43,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:43,308 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:14:43,308 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:14:43,316 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,352 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,445 INFO L138 Inliner]: procedures = 26, calls = 71, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 645 [2023-11-06 21:14:43,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:14:43,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:14:43,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:14:43,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:14:43,463 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,478 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,588 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:14:43,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:14:43,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:14:43,612 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:14:43,613 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (1/1) ... [2023-11-06 21:14:43,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:14:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:43,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:14:43,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:14:43,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:14:43,699 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:14:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:14:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:14:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:14:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:14:43,861 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:14:43,863 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:14:45,166 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:14:45,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:14:45,183 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:14:45,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:45 BoogieIcfgContainer [2023-11-06 21:14:45,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:14:45,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:14:45,192 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:14:45,196 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:14:45,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:14:42" (1/3) ... [2023-11-06 21:14:45,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ea9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:45, skipping insertion in model container [2023-11-06 21:14:45,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:14:43" (2/3) ... [2023-11-06 21:14:45,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286ea9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:14:45, skipping insertion in model container [2023-11-06 21:14:45,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:14:45" (3/3) ... [2023-11-06 21:14:45,201 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-98.i [2023-11-06 21:14:45,223 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:14:45,223 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:14:45,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:14:45,319 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=LoopsAndPotentialCycles, 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;@227a5567, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:14:45,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:14:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 253 states, 192 states have (on average 1.5677083333333333) internal successors, (301), 193 states have internal predecessors, (301), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-06 21:14:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:14:45,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:45,361 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:45,362 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:45,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:45,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1950707599, now seen corresponding path program 1 times [2023-11-06 21:14:45,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:45,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263532746] [2023-11-06 21:14:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263532746] [2023-11-06 21:14:45,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:14:45,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141151652] [2023-11-06 21:14:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:45,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:45,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:45,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:45,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:14:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:46,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:14:46,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 6498 trivial. 0 not checked. [2023-11-06 21:14:46,456 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:46,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141151652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:46,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:46,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:14:46,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222339781] [2023-11-06 21:14:46,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:46,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:14:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:46,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:14:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:14:46,536 INFO L87 Difference]: Start difference. First operand has 253 states, 192 states have (on average 1.5677083333333333) internal successors, (301), 193 states have internal predecessors, (301), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Second operand has 2 states, 2 states have (on average 62.0) internal successors, (124), 2 states have internal predecessors, (124), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-06 21:14:46,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:46,612 INFO L93 Difference]: Finished difference Result 499 states and 886 transitions. [2023-11-06 21:14:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:14:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 62.0) internal successors, (124), 2 states have internal predecessors, (124), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) Word has length 409 [2023-11-06 21:14:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:46,627 INFO L225 Difference]: With dead ends: 499 [2023-11-06 21:14:46,627 INFO L226 Difference]: Without dead ends: 249 [2023-11-06 21:14:46,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:14:46,637 INFO L413 NwaCegarLoop]: 410 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, 410 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 [2023-11-06 21:14:46,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:14:46,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-11-06 21:14:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2023-11-06 21:14:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 189 states have (on average 1.5555555555555556) internal successors, (294), 189 states have internal predecessors, (294), 58 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2023-11-06 21:14:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 410 transitions. [2023-11-06 21:14:46,724 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 410 transitions. Word has length 409 [2023-11-06 21:14:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:46,725 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 410 transitions. [2023-11-06 21:14:46,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 62.0) internal successors, (124), 2 states have internal predecessors, (124), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-06 21:14:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 410 transitions. [2023-11-06 21:14:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:14:46,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:46,739 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:46,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:46,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:14:46,948 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:46,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1456414987, now seen corresponding path program 1 times [2023-11-06 21:14:46,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:46,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039368808] [2023-11-06 21:14:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:46,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:47,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:47,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19836488] [2023-11-06 21:14:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:47,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:47,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:47,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:47,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:14:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:47,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:14:47,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3220 proven. 0 refuted. 0 times theorem prover too weak. 3392 trivial. 0 not checked. [2023-11-06 21:14:48,256 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:48,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039368808] [2023-11-06 21:14:48,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19836488] [2023-11-06 21:14:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19836488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:48,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:48,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:14:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565061816] [2023-11-06 21:14:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:48,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:14:48,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:14:48,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:14:48,272 INFO L87 Difference]: Start difference. First operand 249 states and 410 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-06 21:14:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:50,178 INFO L93 Difference]: Finished difference Result 1049 states and 1729 transitions. [2023-11-06 21:14:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:14:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 409 [2023-11-06 21:14:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:50,190 INFO L225 Difference]: With dead ends: 1049 [2023-11-06 21:14:50,190 INFO L226 Difference]: Without dead ends: 803 [2023-11-06 21:14:50,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:14:50,193 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 1700 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 2526 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:50,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 2526 Invalid, 1246 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [272 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:14:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2023-11-06 21:14:50,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 582. [2023-11-06 21:14:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 442 states have (on average 1.5452488687782806) internal successors, (683), 444 states have internal predecessors, (683), 135 states have call successors, (135), 4 states have call predecessors, (135), 4 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 21:14:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 953 transitions. [2023-11-06 21:14:50,320 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 953 transitions. Word has length 409 [2023-11-06 21:14:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:50,325 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 953 transitions. [2023-11-06 21:14:50,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 2 states have call successors, (58), 2 states have call predecessors, (58), 2 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-11-06 21:14:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 953 transitions. [2023-11-06 21:14:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:14:50,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:50,337 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:50,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:50,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:50,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:50,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:50,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1478483651, now seen corresponding path program 1 times [2023-11-06 21:14:50,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:50,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444827329] [2023-11-06 21:14:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:50,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:50,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:50,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296457193] [2023-11-06 21:14:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:50,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:50,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:50,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:50,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:14:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:51,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:14:51,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:14:51,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:51,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:51,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444827329] [2023-11-06 21:14:51,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:51,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296457193] [2023-11-06 21:14:51,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296457193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:51,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:51,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310823656] [2023-11-06 21:14:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:51,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:51,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:51,136 INFO L87 Difference]: Start difference. First operand 582 states and 953 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:51,346 INFO L93 Difference]: Finished difference Result 1667 states and 2723 transitions. [2023-11-06 21:14:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:51,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 409 [2023-11-06 21:14:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:51,359 INFO L225 Difference]: With dead ends: 1667 [2023-11-06 21:14:51,359 INFO L226 Difference]: Without dead ends: 1088 [2023-11-06 21:14:51,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:51,363 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 372 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:51,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1083 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:14:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2023-11-06 21:14:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 760. [2023-11-06 21:14:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 620 states have (on average 1.5758064516129033) internal successors, (977), 622 states have internal predecessors, (977), 135 states have call successors, (135), 4 states have call predecessors, (135), 4 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-06 21:14:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1247 transitions. [2023-11-06 21:14:51,496 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1247 transitions. Word has length 409 [2023-11-06 21:14:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:51,497 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1247 transitions. [2023-11-06 21:14:51,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1247 transitions. [2023-11-06 21:14:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:14:51,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:51,503 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:51,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:51,712 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:51,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1397243391, now seen corresponding path program 1 times [2023-11-06 21:14:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:51,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131869543] [2023-11-06 21:14:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:51,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:51,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:51,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786270077] [2023-11-06 21:14:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:51,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:51,806 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:51,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:14:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:52,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:14:52,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:14:52,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:52,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:52,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131869543] [2023-11-06 21:14:52,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:52,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786270077] [2023-11-06 21:14:52,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786270077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:52,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:52,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:14:52,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807820832] [2023-11-06 21:14:52,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:52,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:14:52,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:52,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:14:52,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:52,290 INFO L87 Difference]: Start difference. First operand 760 states and 1247 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:52,536 INFO L93 Difference]: Finished difference Result 2262 states and 3711 transitions. [2023-11-06 21:14:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:14:52,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 409 [2023-11-06 21:14:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:52,550 INFO L225 Difference]: With dead ends: 2262 [2023-11-06 21:14:52,550 INFO L226 Difference]: Without dead ends: 1505 [2023-11-06 21:14:52,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:14:52,554 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 391 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:52,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1165 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:14:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2023-11-06 21:14:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1491. [2023-11-06 21:14:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1212 states have (on average 1.5544554455445545) internal successors, (1884), 1216 states have internal predecessors, (1884), 270 states have call successors, (270), 8 states have call predecessors, (270), 8 states have return successors, (270), 266 states have call predecessors, (270), 270 states have call successors, (270) [2023-11-06 21:14:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2424 transitions. [2023-11-06 21:14:52,735 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2424 transitions. Word has length 409 [2023-11-06 21:14:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:52,737 INFO L495 AbstractCegarLoop]: Abstraction has 1491 states and 2424 transitions. [2023-11-06 21:14:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2424 transitions. [2023-11-06 21:14:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:14:52,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:52,746 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:52,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:14:52,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:52,955 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:52,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1403778495, now seen corresponding path program 1 times [2023-11-06 21:14:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:52,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633888363] [2023-11-06 21:14:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:53,042 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236992035] [2023-11-06 21:14:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:53,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:53,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:53,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:14:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:53,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:14:53,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:14:53,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:53,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:53,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633888363] [2023-11-06 21:14:53,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:53,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236992035] [2023-11-06 21:14:53,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236992035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:53,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:14:53,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776586959] [2023-11-06 21:14:53,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:53,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:14:53,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:14:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:53,612 INFO L87 Difference]: Start difference. First operand 1491 states and 2424 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:54,173 INFO L93 Difference]: Finished difference Result 4609 states and 7490 transitions. [2023-11-06 21:14:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:14:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 409 [2023-11-06 21:14:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:54,198 INFO L225 Difference]: With dead ends: 4609 [2023-11-06 21:14:54,198 INFO L226 Difference]: Without dead ends: 3121 [2023-11-06 21:14:54,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:14:54,205 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 782 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:54,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 1071 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:14:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2023-11-06 21:14:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2975. [2023-11-06 21:14:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2418 states have (on average 1.543424317617866) internal successors, (3732), 2426 states have internal predecessors, (3732), 540 states have call successors, (540), 16 states have call predecessors, (540), 16 states have return successors, (540), 532 states have call predecessors, (540), 540 states have call successors, (540) [2023-11-06 21:14:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 4812 transitions. [2023-11-06 21:14:54,620 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 4812 transitions. Word has length 409 [2023-11-06 21:14:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:54,622 INFO L495 AbstractCegarLoop]: Abstraction has 2975 states and 4812 transitions. [2023-11-06 21:14:54,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:54,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 4812 transitions. [2023-11-06 21:14:54,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:14:54,630 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:54,631 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:54,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 21:14:54,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:54,839 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:54,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:54,840 INFO L85 PathProgramCache]: Analyzing trace with hash -624807615, now seen corresponding path program 1 times [2023-11-06 21:14:54,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:54,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124662529] [2023-11-06 21:14:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:54,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:54,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:54,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027796638] [2023-11-06 21:14:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:54,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:54,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:54,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:14:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:55,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:14:55,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:14:55,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:14:55,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:55,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124662529] [2023-11-06 21:14:55,720 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:55,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027796638] [2023-11-06 21:14:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027796638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:14:55,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:14:55,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:14:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623572688] [2023-11-06 21:14:55,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:14:55,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:14:55,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:55,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:14:55,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:14:55,724 INFO L87 Difference]: Start difference. First operand 2975 states and 4812 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:14:57,010 INFO L93 Difference]: Finished difference Result 8576 states and 13830 transitions. [2023-11-06 21:14:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:14:57,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 409 [2023-11-06 21:14:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:14:57,048 INFO L225 Difference]: With dead ends: 8576 [2023-11-06 21:14:57,049 INFO L226 Difference]: Without dead ends: 5604 [2023-11-06 21:14:57,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:14:57,059 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 806 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:14:57,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [806 Valid, 1493 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:14:57,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2023-11-06 21:14:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 3921. [2023-11-06 21:14:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3476 states have (on average 1.568469505178366) internal successors, (5452), 3484 states have internal predecessors, (5452), 424 states have call successors, (424), 20 states have call predecessors, (424), 20 states have return successors, (424), 416 states have call predecessors, (424), 424 states have call successors, (424) [2023-11-06 21:14:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 6300 transitions. [2023-11-06 21:14:57,538 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 6300 transitions. Word has length 409 [2023-11-06 21:14:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:14:57,540 INFO L495 AbstractCegarLoop]: Abstraction has 3921 states and 6300 transitions. [2023-11-06 21:14:57,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:14:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 6300 transitions. [2023-11-06 21:14:57,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:14:57,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:14:57,550 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:14:57,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 21:14:57,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:14:57,758 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:14:57,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:14:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash -405952897, now seen corresponding path program 1 times [2023-11-06 21:14:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:14:57,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9816066] [2023-11-06 21:14:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:14:57,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:14:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891372513] [2023-11-06 21:14:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:14:57,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:14:57,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:14:57,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:14:57,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:14:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:14:58,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:14:58,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:14:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3363 proven. 84 refuted. 0 times theorem prover too weak. 3165 trivial. 0 not checked. [2023-11-06 21:14:58,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:14:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 87 proven. 84 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-06 21:14:59,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:14:59,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9816066] [2023-11-06 21:14:59,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:14:59,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891372513] [2023-11-06 21:14:59,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891372513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:14:59,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:14:59,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:14:59,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565000730] [2023-11-06 21:14:59,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:14:59,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:14:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:14:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:14:59,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:14:59,252 INFO L87 Difference]: Start difference. First operand 3921 states and 6300 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-06 21:15:00,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:00,164 INFO L93 Difference]: Finished difference Result 7816 states and 12535 transitions. [2023-11-06 21:15:00,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:15:00,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 409 [2023-11-06 21:15:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:00,190 INFO L225 Difference]: With dead ends: 7816 [2023-11-06 21:15:00,191 INFO L226 Difference]: Without dead ends: 3874 [2023-11-06 21:15:00,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 810 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:15:00,201 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 239 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:00,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 989 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:15:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3874 states. [2023-11-06 21:15:00,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3874 to 3787. [2023-11-06 21:15:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3338 states have (on average 1.5578190533253444) internal successors, (5200), 3346 states have internal predecessors, (5200), 424 states have call successors, (424), 24 states have call predecessors, (424), 24 states have return successors, (424), 416 states have call predecessors, (424), 424 states have call successors, (424) [2023-11-06 21:15:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 6048 transitions. [2023-11-06 21:15:00,579 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 6048 transitions. Word has length 409 [2023-11-06 21:15:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:00,580 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 6048 transitions. [2023-11-06 21:15:00,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-06 21:15:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 6048 transitions. [2023-11-06 21:15:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:00,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:00,589 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:00,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:00,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:15:00,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:00,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:00,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1837647231, now seen corresponding path program 1 times [2023-11-06 21:15:00,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:00,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081588557] [2023-11-06 21:15:00,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:00,874 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:00,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221829634] [2023-11-06 21:15:00,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:00,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:00,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:00,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:00,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:15:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:01,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:15:01,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 711 proven. 162 refuted. 0 times theorem prover too weak. 5739 trivial. 0 not checked. [2023-11-06 21:15:03,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 9 proven. 162 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-06 21:15:03,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:03,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081588557] [2023-11-06 21:15:03,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:03,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221829634] [2023-11-06 21:15:03,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221829634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:03,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:03,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 21:15:03,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306772454] [2023-11-06 21:15:03,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:15:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:03,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:15:03,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:15:03,862 INFO L87 Difference]: Start difference. First operand 3787 states and 6048 transitions. Second operand has 14 states, 14 states have (on average 12.5) internal successors, (175), 14 states have internal predecessors, (175), 4 states have call successors, (116), 3 states have call predecessors, (116), 5 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2023-11-06 21:15:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:06,321 INFO L93 Difference]: Finished difference Result 13510 states and 21710 transitions. [2023-11-06 21:15:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:15:06,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.5) internal successors, (175), 14 states have internal predecessors, (175), 4 states have call successors, (116), 3 states have call predecessors, (116), 5 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) Word has length 409 [2023-11-06 21:15:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:06,377 INFO L225 Difference]: With dead ends: 13510 [2023-11-06 21:15:06,378 INFO L226 Difference]: Without dead ends: 9726 [2023-11-06 21:15:06,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:15:06,389 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1980 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 1644 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2037 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:06,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2037 Valid, 3364 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1644 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 21:15:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9726 states. [2023-11-06 21:15:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9726 to 3905. [2023-11-06 21:15:06,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3393 states have (on average 1.5496610669024462) internal successors, (5258), 3401 states have internal predecessors, (5258), 482 states have call successors, (482), 29 states have call predecessors, (482), 29 states have return successors, (482), 474 states have call predecessors, (482), 482 states have call successors, (482) [2023-11-06 21:15:06,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 6222 transitions. [2023-11-06 21:15:06,888 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 6222 transitions. Word has length 409 [2023-11-06 21:15:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:06,889 INFO L495 AbstractCegarLoop]: Abstraction has 3905 states and 6222 transitions. [2023-11-06 21:15:06,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.5) internal successors, (175), 14 states have internal predecessors, (175), 4 states have call successors, (116), 3 states have call predecessors, (116), 5 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2023-11-06 21:15:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 6222 transitions. [2023-11-06 21:15:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:06,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:06,897 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:06,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:07,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:15:07,114 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:07,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:07,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2077886977, now seen corresponding path program 1 times [2023-11-06 21:15:07,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:07,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386981330] [2023-11-06 21:15:07,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:07,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:07,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:07,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138611375] [2023-11-06 21:15:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:07,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:07,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:07,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:07,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:15:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:07,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:15:07,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3648 proven. 45 refuted. 0 times theorem prover too weak. 2919 trivial. 0 not checked. [2023-11-06 21:15:08,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-06 21:15:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386981330] [2023-11-06 21:15:09,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:09,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138611375] [2023-11-06 21:15:09,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138611375] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:09,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:09,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 21:15:09,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713658306] [2023-11-06 21:15:09,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:09,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:15:09,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:09,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:15:09,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:15:09,049 INFO L87 Difference]: Start difference. First operand 3905 states and 6222 transitions. Second operand has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 5 states have call successors, (109), 3 states have call predecessors, (109), 5 states have return successors, (109), 5 states have call predecessors, (109), 5 states have call successors, (109) [2023-11-06 21:15:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:10,018 INFO L93 Difference]: Finished difference Result 7745 states and 12318 transitions. [2023-11-06 21:15:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:15:10,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 5 states have call successors, (109), 3 states have call predecessors, (109), 5 states have return successors, (109), 5 states have call predecessors, (109), 5 states have call successors, (109) Word has length 409 [2023-11-06 21:15:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:10,031 INFO L225 Difference]: With dead ends: 7745 [2023-11-06 21:15:10,031 INFO L226 Difference]: Without dead ends: 3961 [2023-11-06 21:15:10,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 806 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:15:10,040 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 804 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:10,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 983 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:15:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2023-11-06 21:15:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 3925. [2023-11-06 21:15:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3925 states, 3408 states have (on average 1.5331572769953052) internal successors, (5225), 3416 states have internal predecessors, (5225), 482 states have call successors, (482), 34 states have call predecessors, (482), 34 states have return successors, (482), 474 states have call predecessors, (482), 482 states have call successors, (482) [2023-11-06 21:15:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 6189 transitions. [2023-11-06 21:15:10,475 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 6189 transitions. Word has length 409 [2023-11-06 21:15:10,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:10,476 INFO L495 AbstractCegarLoop]: Abstraction has 3925 states and 6189 transitions. [2023-11-06 21:15:10,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 5 states have call successors, (109), 3 states have call predecessors, (109), 5 states have return successors, (109), 5 states have call predecessors, (109), 5 states have call successors, (109) [2023-11-06 21:15:10,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 6189 transitions. [2023-11-06 21:15:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:10,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:10,485 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:10,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:10,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:10,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:10,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1255950139, now seen corresponding path program 1 times [2023-11-06 21:15:10,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:10,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999741085] [2023-11-06 21:15:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:10,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:10,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759792179] [2023-11-06 21:15:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:10,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:10,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:10,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:10,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:15:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:11,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:15:11,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:15:11,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:11,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999741085] [2023-11-06 21:15:11,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759792179] [2023-11-06 21:15:11,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759792179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:11,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:11,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:15:11,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753264028] [2023-11-06 21:15:11,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:11,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:15:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:15:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:15:11,425 INFO L87 Difference]: Start difference. First operand 3925 states and 6189 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:13,243 INFO L93 Difference]: Finished difference Result 17039 states and 27105 transitions. [2023-11-06 21:15:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:15:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 409 [2023-11-06 21:15:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:13,284 INFO L225 Difference]: With dead ends: 17039 [2023-11-06 21:15:13,285 INFO L226 Difference]: Without dead ends: 13239 [2023-11-06 21:15:13,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:13,295 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 1166 mSDsluCounter, 2236 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:13,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 3322 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:15:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13239 states. [2023-11-06 21:15:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13239 to 8847. [2023-11-06 21:15:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 7878 states have (on average 1.539096217314039) internal successors, (12125), 7894 states have internal predecessors, (12125), 906 states have call successors, (906), 62 states have call predecessors, (906), 62 states have return successors, (906), 890 states have call predecessors, (906), 906 states have call successors, (906) [2023-11-06 21:15:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 13937 transitions. [2023-11-06 21:15:14,359 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 13937 transitions. Word has length 409 [2023-11-06 21:15:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:14,360 INFO L495 AbstractCegarLoop]: Abstraction has 8847 states and 13937 transitions. [2023-11-06 21:15:14,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 13937 transitions. [2023-11-06 21:15:14,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:14,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:14,375 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:14,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:15:14,583 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:14,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash 254588475, now seen corresponding path program 1 times [2023-11-06 21:15:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:14,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748968160] [2023-11-06 21:15:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:14,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:14,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53681110] [2023-11-06 21:15:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:14,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:14,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:14,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:15:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:15,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:15:15,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3437 proven. 213 refuted. 0 times theorem prover too weak. 2962 trivial. 0 not checked. [2023-11-06 21:15:15,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 123 proven. 216 refuted. 0 times theorem prover too weak. 6273 trivial. 0 not checked. [2023-11-06 21:15:16,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:16,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748968160] [2023-11-06 21:15:16,380 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:16,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53681110] [2023-11-06 21:15:16,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53681110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:16,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:16,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 21:15:16,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766717468] [2023-11-06 21:15:16,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:16,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 21:15:16,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 21:15:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-06 21:15:16,384 INFO L87 Difference]: Start difference. First operand 8847 states and 13937 transitions. Second operand has 16 states, 16 states have (on average 11.0625) internal successors, (177), 16 states have internal predecessors, (177), 5 states have call successors, (96), 3 states have call predecessors, (96), 7 states have return successors, (97), 5 states have call predecessors, (97), 5 states have call successors, (97) [2023-11-06 21:15:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:17,670 INFO L93 Difference]: Finished difference Result 12889 states and 20248 transitions. [2023-11-06 21:15:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:15:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.0625) internal successors, (177), 16 states have internal predecessors, (177), 5 states have call successors, (96), 3 states have call predecessors, (96), 7 states have return successors, (97), 5 states have call predecessors, (97), 5 states have call successors, (97) Word has length 409 [2023-11-06 21:15:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:17,685 INFO L225 Difference]: With dead ends: 12889 [2023-11-06 21:15:17,685 INFO L226 Difference]: Without dead ends: 4167 [2023-11-06 21:15:17,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:15:17,700 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1335 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:17,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1355 Valid, 1331 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 21:15:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2023-11-06 21:15:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 4131. [2023-11-06 21:15:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4131 states, 3552 states have (on average 1.521114864864865) internal successors, (5403), 3552 states have internal predecessors, (5403), 522 states have call successors, (522), 56 states have call predecessors, (522), 56 states have return successors, (522), 522 states have call predecessors, (522), 522 states have call successors, (522) [2023-11-06 21:15:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4131 states to 4131 states and 6447 transitions. [2023-11-06 21:15:18,173 INFO L78 Accepts]: Start accepts. Automaton has 4131 states and 6447 transitions. Word has length 409 [2023-11-06 21:15:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:18,174 INFO L495 AbstractCegarLoop]: Abstraction has 4131 states and 6447 transitions. [2023-11-06 21:15:18,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.0625) internal successors, (177), 16 states have internal predecessors, (177), 5 states have call successors, (96), 3 states have call predecessors, (96), 7 states have return successors, (97), 5 states have call predecessors, (97), 5 states have call successors, (97) [2023-11-06 21:15:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4131 states and 6447 transitions. [2023-11-06 21:15:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:18,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:18,182 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:18,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:18,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:18,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:18,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:18,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1607329467, now seen corresponding path program 1 times [2023-11-06 21:15:18,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:18,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498324962] [2023-11-06 21:15:18,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:18,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:18,461 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:18,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893866908] [2023-11-06 21:15:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:18,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:18,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:18,463 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:18,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:15:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:18,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:15:18,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:15:19,029 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:19,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:19,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498324962] [2023-11-06 21:15:19,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:19,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893866908] [2023-11-06 21:15:19,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893866908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:19,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:19,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 21:15:19,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65031753] [2023-11-06 21:15:19,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:15:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:15:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:15:19,033 INFO L87 Difference]: Start difference. First operand 4131 states and 6447 transitions. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:20,659 INFO L93 Difference]: Finished difference Result 14919 states and 23355 transitions. [2023-11-06 21:15:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:15:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 409 [2023-11-06 21:15:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:20,689 INFO L225 Difference]: With dead ends: 14919 [2023-11-06 21:15:20,689 INFO L226 Difference]: Without dead ends: 10921 [2023-11-06 21:15:20,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:15:20,700 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 1176 mSDsluCounter, 2249 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:20,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1176 Valid, 2982 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:15:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10921 states. [2023-11-06 21:15:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10921 to 8327. [2023-11-06 21:15:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8327 states, 7324 states have (on average 1.5187056253413436) internal successors, (11123), 7340 states have internal predecessors, (11123), 906 states have call successors, (906), 96 states have call predecessors, (906), 96 states have return successors, (906), 890 states have call predecessors, (906), 906 states have call successors, (906) [2023-11-06 21:15:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8327 states to 8327 states and 12935 transitions. [2023-11-06 21:15:21,568 INFO L78 Accepts]: Start accepts. Automaton has 8327 states and 12935 transitions. Word has length 409 [2023-11-06 21:15:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:21,569 INFO L495 AbstractCegarLoop]: Abstraction has 8327 states and 12935 transitions. [2023-11-06 21:15:21,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:21,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8327 states and 12935 transitions. [2023-11-06 21:15:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:21,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:21,580 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:21,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:21,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:21,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:21,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:21,790 INFO L85 PathProgramCache]: Analyzing trace with hash -238037699, now seen corresponding path program 1 times [2023-11-06 21:15:21,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:21,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773608991] [2023-11-06 21:15:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:21,861 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559808965] [2023-11-06 21:15:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:21,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:21,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:21,863 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:21,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:15:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:22,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 21:15:22,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3363 proven. 84 refuted. 0 times theorem prover too weak. 3165 trivial. 0 not checked. [2023-11-06 21:15:22,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 87 proven. 84 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-06 21:15:23,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773608991] [2023-11-06 21:15:23,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:23,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559808965] [2023-11-06 21:15:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559808965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:23,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:23,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2023-11-06 21:15:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511237523] [2023-11-06 21:15:23,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:23,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:15:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:15:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:15:23,189 INFO L87 Difference]: Start difference. First operand 8327 states and 12935 transitions. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-06 21:15:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:25,126 INFO L93 Difference]: Finished difference Result 14683 states and 22784 transitions. [2023-11-06 21:15:25,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 21:15:25,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 409 [2023-11-06 21:15:25,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:25,147 INFO L225 Difference]: With dead ends: 14683 [2023-11-06 21:15:25,148 INFO L226 Difference]: Without dead ends: 6489 [2023-11-06 21:15:25,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 807 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:15:25,162 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 742 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:25,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 1515 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 21:15:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2023-11-06 21:15:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 6355. [2023-11-06 21:15:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5352 states have (on average 1.4990657698056802) internal successors, (8023), 5368 states have internal predecessors, (8023), 906 states have call successors, (906), 96 states have call predecessors, (906), 96 states have return successors, (906), 890 states have call predecessors, (906), 906 states have call successors, (906) [2023-11-06 21:15:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 9835 transitions. [2023-11-06 21:15:25,948 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 9835 transitions. Word has length 409 [2023-11-06 21:15:25,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:25,949 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 9835 transitions. [2023-11-06 21:15:25,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 2 states have call successors, (86), 2 states have call predecessors, (86), 4 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-06 21:15:25,949 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 9835 transitions. [2023-11-06 21:15:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:25,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:25,959 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:25,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:15:26,168 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:26,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2139792767, now seen corresponding path program 1 times [2023-11-06 21:15:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:26,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780974040] [2023-11-06 21:15:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:26,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:26,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129741768] [2023-11-06 21:15:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:26,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:26,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:26,239 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:26,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:15:26,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:26,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:15:26,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3452 proven. 0 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-06 21:15:28,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:28,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:28,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780974040] [2023-11-06 21:15:28,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:28,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129741768] [2023-11-06 21:15:28,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129741768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:28,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:28,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:15:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539897953] [2023-11-06 21:15:28,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:28,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:15:28,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:15:28,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:15:28,556 INFO L87 Difference]: Start difference. First operand 6355 states and 9835 transitions. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 4 states have call successors, (58), 4 states have call predecessors, (58), 4 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) [2023-11-06 21:15:29,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:29,539 INFO L93 Difference]: Finished difference Result 12577 states and 19484 transitions. [2023-11-06 21:15:29,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:15:29,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 4 states have call successors, (58), 4 states have call predecessors, (58), 4 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) Word has length 409 [2023-11-06 21:15:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:29,554 INFO L225 Difference]: With dead ends: 12577 [2023-11-06 21:15:29,554 INFO L226 Difference]: Without dead ends: 6355 [2023-11-06 21:15:29,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:15:29,562 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 463 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:29,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 691 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:15:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6355 states. [2023-11-06 21:15:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6355 to 6355. [2023-11-06 21:15:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5352 states have (on average 1.4871076233183858) internal successors, (7959), 5368 states have internal predecessors, (7959), 906 states have call successors, (906), 96 states have call predecessors, (906), 96 states have return successors, (906), 890 states have call predecessors, (906), 906 states have call successors, (906) [2023-11-06 21:15:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 9771 transitions. [2023-11-06 21:15:30,411 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 9771 transitions. Word has length 409 [2023-11-06 21:15:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:30,412 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 9771 transitions. [2023-11-06 21:15:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 4 states have call successors, (58), 4 states have call predecessors, (58), 4 states have return successors, (58), 4 states have call predecessors, (58), 4 states have call successors, (58) [2023-11-06 21:15:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 9771 transitions. [2023-11-06 21:15:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2023-11-06 21:15:30,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:30,421 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:30,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:30,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:15:30,630 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:30,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:30,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1337526079, now seen corresponding path program 1 times [2023-11-06 21:15:30,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:30,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076545549] [2023-11-06 21:15:30,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:30,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:30,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:30,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875465350] [2023-11-06 21:15:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:30,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:30,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:30,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:30,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:15:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:31,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:15:31,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 4526 proven. 177 refuted. 0 times theorem prover too weak. 1909 trivial. 0 not checked. [2023-11-06 21:15:33,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 159 proven. 180 refuted. 0 times theorem prover too weak. 6273 trivial. 0 not checked. [2023-11-06 21:15:33,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:33,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076545549] [2023-11-06 21:15:33,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875465350] [2023-11-06 21:15:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875465350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:33,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-06 21:15:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465556303] [2023-11-06 21:15:33,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 21:15:33,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 21:15:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:15:33,750 INFO L87 Difference]: Start difference. First operand 6355 states and 9771 transitions. Second operand has 22 states, 22 states have (on average 10.636363636363637) internal successors, (234), 22 states have internal predecessors, (234), 7 states have call successors, (97), 4 states have call predecessors, (97), 8 states have return successors, (98), 7 states have call predecessors, (98), 7 states have call successors, (98) [2023-11-06 21:15:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:36,568 INFO L93 Difference]: Finished difference Result 18391 states and 28238 transitions. [2023-11-06 21:15:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:15:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 10.636363636363637) internal successors, (234), 22 states have internal predecessors, (234), 7 states have call successors, (97), 4 states have call predecessors, (97), 8 states have return successors, (98), 7 states have call predecessors, (98), 7 states have call successors, (98) Word has length 409 [2023-11-06 21:15:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:36,595 INFO L225 Difference]: With dead ends: 18391 [2023-11-06 21:15:36,595 INFO L226 Difference]: Without dead ends: 12169 [2023-11-06 21:15:36,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=1104, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 21:15:36,606 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1730 mSDsluCounter, 1643 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1749 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:36,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1749 Valid, 1962 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 21:15:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12169 states. [2023-11-06 21:15:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12169 to 5359. [2023-11-06 21:15:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5359 states, 4745 states have (on average 1.5022128556375132) internal successors, (7128), 4745 states have internal predecessors, (7128), 522 states have call successors, (522), 91 states have call predecessors, (522), 91 states have return successors, (522), 522 states have call predecessors, (522), 522 states have call successors, (522) [2023-11-06 21:15:37,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5359 states to 5359 states and 8172 transitions. [2023-11-06 21:15:37,401 INFO L78 Accepts]: Start accepts. Automaton has 5359 states and 8172 transitions. Word has length 409 [2023-11-06 21:15:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:37,402 INFO L495 AbstractCegarLoop]: Abstraction has 5359 states and 8172 transitions. [2023-11-06 21:15:37,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.636363636363637) internal successors, (234), 22 states have internal predecessors, (234), 7 states have call successors, (97), 4 states have call predecessors, (97), 8 states have return successors, (98), 7 states have call predecessors, (98), 7 states have call successors, (98) [2023-11-06 21:15:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 5359 states and 8172 transitions. [2023-11-06 21:15:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2023-11-06 21:15:37,409 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:37,410 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:37,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:37,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:15:37,619 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:37,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1617041806, now seen corresponding path program 1 times [2023-11-06 21:15:37,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:37,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754236058] [2023-11-06 21:15:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:37,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:37,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456905517] [2023-11-06 21:15:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:37,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:37,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:37,684 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:37,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:15:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:38,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 21:15:38,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 4404 proven. 177 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2023-11-06 21:15:40,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:15:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 159 proven. 180 refuted. 0 times theorem prover too weak. 6273 trivial. 0 not checked. [2023-11-06 21:15:40,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:40,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754236058] [2023-11-06 21:15:40,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:40,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456905517] [2023-11-06 21:15:40,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456905517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:15:40,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:15:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-11-06 21:15:40,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690489429] [2023-11-06 21:15:40,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:15:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:15:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:15:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:15:40,743 INFO L87 Difference]: Start difference. First operand 5359 states and 8172 transitions. Second operand has 20 states, 20 states have (on average 12.45) internal successors, (249), 20 states have internal predecessors, (249), 6 states have call successors, (116), 4 states have call predecessors, (116), 8 states have return successors, (116), 6 states have call predecessors, (116), 6 states have call successors, (116) [2023-11-06 21:15:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:45,929 INFO L93 Difference]: Finished difference Result 25005 states and 38337 transitions. [2023-11-06 21:15:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 21:15:45,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 12.45) internal successors, (249), 20 states have internal predecessors, (249), 6 states have call successors, (116), 4 states have call predecessors, (116), 8 states have return successors, (116), 6 states have call predecessors, (116), 6 states have call successors, (116) Word has length 410 [2023-11-06 21:15:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:45,966 INFO L225 Difference]: With dead ends: 25005 [2023-11-06 21:15:45,966 INFO L226 Difference]: Without dead ends: 19791 [2023-11-06 21:15:45,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 804 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=732, Invalid=1430, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 21:15:45,978 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 3384 mSDsluCounter, 4332 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 4899 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:45,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 4899 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-06 21:15:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19791 states. [2023-11-06 21:15:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19791 to 9107. [2023-11-06 21:15:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9107 states, 7949 states have (on average 1.4925147817335513) internal successors, (11864), 7949 states have internal predecessors, (11864), 986 states have call successors, (986), 171 states have call predecessors, (986), 171 states have return successors, (986), 986 states have call predecessors, (986), 986 states have call successors, (986) [2023-11-06 21:15:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9107 states to 9107 states and 13836 transitions. [2023-11-06 21:15:47,147 INFO L78 Accepts]: Start accepts. Automaton has 9107 states and 13836 transitions. Word has length 410 [2023-11-06 21:15:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:47,148 INFO L495 AbstractCegarLoop]: Abstraction has 9107 states and 13836 transitions. [2023-11-06 21:15:47,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.45) internal successors, (249), 20 states have internal predecessors, (249), 6 states have call successors, (116), 4 states have call predecessors, (116), 8 states have return successors, (116), 6 states have call predecessors, (116), 6 states have call successors, (116) [2023-11-06 21:15:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9107 states and 13836 transitions. [2023-11-06 21:15:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2023-11-06 21:15:47,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:47,159 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:47,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:47,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:15:47,368 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:47,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash -279261338, now seen corresponding path program 1 times [2023-11-06 21:15:47,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:47,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029999996] [2023-11-06 21:15:47,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:47,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:47,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:47,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316593711] [2023-11-06 21:15:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:47,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:47,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:47,433 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:47,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:15:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:48,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:15:48,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:15:48,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:48,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:48,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029999996] [2023-11-06 21:15:48,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:48,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316593711] [2023-11-06 21:15:48,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316593711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:48,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:48,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:15:48,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608686750] [2023-11-06 21:15:48,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:48,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:15:48,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:48,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:15:48,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:48,227 INFO L87 Difference]: Start difference. First operand 9107 states and 13836 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:50,184 INFO L93 Difference]: Finished difference Result 24583 states and 37158 transitions. [2023-11-06 21:15:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:50,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 410 [2023-11-06 21:15:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:50,221 INFO L225 Difference]: With dead ends: 24583 [2023-11-06 21:15:50,222 INFO L226 Difference]: Without dead ends: 15621 [2023-11-06 21:15:50,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:15:50,236 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 728 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:50,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1487 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:15:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15621 states. [2023-11-06 21:15:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15621 to 12027. [2023-11-06 21:15:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12027 states, 10869 states have (on average 1.508142423406017) internal successors, (16392), 10869 states have internal predecessors, (16392), 986 states have call successors, (986), 171 states have call predecessors, (986), 171 states have return successors, (986), 986 states have call predecessors, (986), 986 states have call successors, (986) [2023-11-06 21:15:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 18364 transitions. [2023-11-06 21:15:51,626 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 18364 transitions. Word has length 410 [2023-11-06 21:15:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:51,627 INFO L495 AbstractCegarLoop]: Abstraction has 12027 states and 18364 transitions. [2023-11-06 21:15:51,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 18364 transitions. [2023-11-06 21:15:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2023-11-06 21:15:51,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:51,638 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:51,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:51,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:15:51,839 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:51,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1282296968, now seen corresponding path program 1 times [2023-11-06 21:15:51,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:51,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349785354] [2023-11-06 21:15:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:51,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522001893] [2023-11-06 21:15:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:51,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:51,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:51,903 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:51,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:15:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:52,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:15:52,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:15:53,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349785354] [2023-11-06 21:15:53,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522001893] [2023-11-06 21:15:53,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522001893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:53,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:53,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:15:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8594161] [2023-11-06 21:15:53,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:53,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:15:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:15:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:53,993 INFO L87 Difference]: Start difference. First operand 12027 states and 18364 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:15:55,676 INFO L93 Difference]: Finished difference Result 27983 states and 42758 transitions. [2023-11-06 21:15:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:15:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 411 [2023-11-06 21:15:55,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:15:55,695 INFO L225 Difference]: With dead ends: 27983 [2023-11-06 21:15:55,695 INFO L226 Difference]: Without dead ends: 16101 [2023-11-06 21:15:55,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:15:55,706 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 473 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:15:55,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1112 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:15:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16101 states. [2023-11-06 21:15:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16101 to 16083. [2023-11-06 21:15:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16083 states, 14861 states have (on average 1.5099925980754996) internal successors, (22440), 14877 states have internal predecessors, (22440), 1034 states have call successors, (1034), 187 states have call predecessors, (1034), 187 states have return successors, (1034), 1018 states have call predecessors, (1034), 1034 states have call successors, (1034) [2023-11-06 21:15:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16083 states to 16083 states and 24508 transitions. [2023-11-06 21:15:56,939 INFO L78 Accepts]: Start accepts. Automaton has 16083 states and 24508 transitions. Word has length 411 [2023-11-06 21:15:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:15:56,940 INFO L495 AbstractCegarLoop]: Abstraction has 16083 states and 24508 transitions. [2023-11-06 21:15:56,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:15:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 16083 states and 24508 transitions. [2023-11-06 21:15:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2023-11-06 21:15:56,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:15:56,958 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:15:56,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:15:57,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:15:57,172 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:15:57,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:15:57,173 INFO L85 PathProgramCache]: Analyzing trace with hash -961686330, now seen corresponding path program 1 times [2023-11-06 21:15:57,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:15:57,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871234871] [2023-11-06 21:15:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:57,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:15:57,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:15:57,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655945597] [2023-11-06 21:15:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:15:57,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:15:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:15:57,262 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:15:57,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:15:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:15:57,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:15:57,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:15:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6612 trivial. 0 not checked. [2023-11-06 21:15:59,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:15:59,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:15:59,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871234871] [2023-11-06 21:15:59,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:15:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655945597] [2023-11-06 21:15:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655945597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:15:59,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:15:59,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:15:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812631376] [2023-11-06 21:15:59,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:15:59,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:15:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:15:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:15:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:15:59,044 INFO L87 Difference]: Start difference. First operand 16083 states and 24508 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:16:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:02,270 INFO L93 Difference]: Finished difference Result 33047 states and 50294 transitions. [2023-11-06 21:16:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:16:02,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) Word has length 411 [2023-11-06 21:16:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:02,296 INFO L225 Difference]: With dead ends: 33047 [2023-11-06 21:16:02,296 INFO L226 Difference]: Without dead ends: 17109 [2023-11-06 21:16:02,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:16:02,311 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 463 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:02,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 1190 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 21:16:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17109 states. [2023-11-06 21:16:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17109 to 13163. [2023-11-06 21:16:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13163 states, 11941 states have (on average 1.494682187421489) internal successors, (17848), 11957 states have internal predecessors, (17848), 1034 states have call successors, (1034), 187 states have call predecessors, (1034), 187 states have return successors, (1034), 1018 states have call predecessors, (1034), 1034 states have call successors, (1034) [2023-11-06 21:16:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13163 states to 13163 states and 19916 transitions. [2023-11-06 21:16:03,672 INFO L78 Accepts]: Start accepts. Automaton has 13163 states and 19916 transitions. Word has length 411 [2023-11-06 21:16:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:03,673 INFO L495 AbstractCegarLoop]: Abstraction has 13163 states and 19916 transitions. [2023-11-06 21:16:03,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (58), 1 states have call predecessors, (58), 1 states have return successors, (58), 1 states have call predecessors, (58), 1 states have call successors, (58) [2023-11-06 21:16:03,673 INFO L276 IsEmpty]: Start isEmpty. Operand 13163 states and 19916 transitions. [2023-11-06 21:16:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2023-11-06 21:16:03,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:03,688 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:03,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:03,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:03,889 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:03,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:03,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1593878655, now seen corresponding path program 1 times [2023-11-06 21:16:03,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:03,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940807963] [2023-11-06 21:16:03,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:03,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:03,966 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:16:03,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016807431] [2023-11-06 21:16:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:03,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:03,968 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:04,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:16:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:04,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:16:04,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 2661 proven. 45 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2023-11-06 21:16:04,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:16:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 6441 trivial. 0 not checked. [2023-11-06 21:16:05,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:16:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940807963] [2023-11-06 21:16:05,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:16:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016807431] [2023-11-06 21:16:05,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016807431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:16:05,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:16:05,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 21:16:05,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901224448] [2023-11-06 21:16:05,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:16:05,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:16:05,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:16:05,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:16:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:16:05,173 INFO L87 Difference]: Start difference. First operand 13163 states and 19916 transitions. Second operand has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2023-11-06 21:16:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:16:06,866 INFO L93 Difference]: Finished difference Result 26315 states and 39771 transitions. [2023-11-06 21:16:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:16:06,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) Word has length 412 [2023-11-06 21:16:06,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:16:06,882 INFO L225 Difference]: With dead ends: 26315 [2023-11-06 21:16:06,882 INFO L226 Difference]: Without dead ends: 13297 [2023-11-06 21:16:06,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:16:06,890 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 790 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:16:06,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 985 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:16:06,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13297 states. [2023-11-06 21:16:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13297 to 13163. [2023-11-06 21:16:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13163 states, 11941 states have (on average 1.4933422661418643) internal successors, (17832), 11957 states have internal predecessors, (17832), 1034 states have call successors, (1034), 187 states have call predecessors, (1034), 187 states have return successors, (1034), 1018 states have call predecessors, (1034), 1034 states have call successors, (1034) [2023-11-06 21:16:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13163 states to 13163 states and 19900 transitions. [2023-11-06 21:16:07,960 INFO L78 Accepts]: Start accepts. Automaton has 13163 states and 19900 transitions. Word has length 412 [2023-11-06 21:16:07,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:16:07,961 INFO L495 AbstractCegarLoop]: Abstraction has 13163 states and 19900 transitions. [2023-11-06 21:16:07,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.1) internal successors, (171), 10 states have internal predecessors, (171), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2023-11-06 21:16:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 13163 states and 19900 transitions. [2023-11-06 21:16:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-11-06 21:16:07,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:16:07,972 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:16:07,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:16:08,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:08,182 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:16:08,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:16:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1414554814, now seen corresponding path program 1 times [2023-11-06 21:16:08,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:16:08,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023704208] [2023-11-06 21:16:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:08,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:16:08,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:16:08,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71174623] [2023-11-06 21:16:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:16:08,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:16:08,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:16:08,250 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:16:08,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb276ff3-5baf-45e4-8461-27256ef27125/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:16:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:16:09,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 131 conjunts are in the unsatisfiable core [2023-11-06 21:16:09,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:16:55,293 WARN L293 SmtUtils]: Spent 9.42s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:17:19,286 WARN L293 SmtUtils]: Spent 5.43s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:17:39,250 WARN L293 SmtUtils]: Spent 6.81s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)