./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-89.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/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_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-89.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/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_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/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 66b7febe3537184e8d8958da06968763cb1ae7e305c09bb234a152dcca71543a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:05:02,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:05:02,662 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:05:02,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:05:02,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:05:02,718 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:05:02,719 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:05:02,719 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:05:02,720 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:05:02,721 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:05:02,722 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:05:02,723 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:05:02,723 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:05:02,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:05:02,725 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:05:02,725 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:05:02,726 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:05:02,726 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:05:02,727 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:05:02,728 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:05:02,728 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:05:02,729 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:05:02,729 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:05:02,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:05:02,730 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:05:02,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:05:02,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:05:02,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:05:02,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:02,733 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:05:02,733 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:05:02,734 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:05:02,734 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:05:02,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:05:02,735 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:05:02,736 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:05:02,736 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:05:02,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:05:02,737 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:05:02,738 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_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66b7febe3537184e8d8958da06968763cb1ae7e305c09bb234a152dcca71543a [2023-11-06 23:05:03,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:05:03,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:05:03,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:05:03,094 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:05:03,094 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:05:03,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-89.i [2023-11-06 23:05:06,201 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:05:06,662 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:05:06,662 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-89.i [2023-11-06 23:05:06,694 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/data/08a2f977b/22e38acc59a6428a977ebcfc0418042b/FLAG8101a933e [2023-11-06 23:05:06,718 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/data/08a2f977b/22e38acc59a6428a977ebcfc0418042b [2023-11-06 23:05:06,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:05:06,729 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:05:06,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:06,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:05:06,737 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:05:06,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:06" (1/1) ... [2023-11-06 23:05:06,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d83ffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:06, skipping insertion in model container [2023-11-06 23:05:06,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:05:06" (1/1) ... [2023-11-06 23:05:06,822 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:05:07,034 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_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-89.i[916,929] [2023-11-06 23:05:07,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:05:07,458 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:05:07,476 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_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-89.i[916,929] [2023-11-06 23:05:07,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:05:07,680 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:05:07,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07 WrapperNode [2023-11-06 23:05:07,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:05:07,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:05:07,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:05:07,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:05:07,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:07,721 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:07,952 INFO L138 Inliner]: procedures = 26, calls = 98, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 779 [2023-11-06 23:05:07,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:05:07,962 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:05:07,963 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:05:07,963 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:05:07,973 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:07,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,138 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,243 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:05:08,244 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:05:08,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:05:08,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:05:08,246 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (1/1) ... [2023-11-06 23:05:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:05:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:08,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:05:08,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:05:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:05:08,333 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:05:08,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:05:08,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:05:08,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:05:08,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:05:08,608 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:05:08,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:05:10,276 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:05:10,297 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:05:10,297 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:05:10,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:10 BoogieIcfgContainer [2023-11-06 23:05:10,302 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:05:10,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:05:10,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:05:10,314 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:05:10,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:05:06" (1/3) ... [2023-11-06 23:05:10,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37caf924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:10, skipping insertion in model container [2023-11-06 23:05:10,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:05:07" (2/3) ... [2023-11-06 23:05:10,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37caf924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:05:10, skipping insertion in model container [2023-11-06 23:05:10,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:05:10" (3/3) ... [2023-11-06 23:05:10,319 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-89.i [2023-11-06 23:05:10,341 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:05:10,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:05:10,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:05:10,439 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;@11be7c02, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:05:10,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:05:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 317 states, 229 states have (on average 1.5502183406113537) internal successors, (355), 230 states have internal predecessors, (355), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-06 23:05:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-06 23:05:10,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:10,514 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:10,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:10,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:10,525 INFO L85 PathProgramCache]: Analyzing trace with hash -511767948, now seen corresponding path program 1 times [2023-11-06 23:05:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:10,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982083641] [2023-11-06 23:05:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:11,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982083641] [2023-11-06 23:05:11,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:05:11,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964824854] [2023-11-06 23:05:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:11,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:11,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:11,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:11,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:05:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:11,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:05:11,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2023-11-06 23:05:11,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:11,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964824854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:11,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:11,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:05:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233666975] [2023-11-06 23:05:11,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:11,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:05:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:05:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:05:11,928 INFO L87 Difference]: Start difference. First operand has 317 states, 229 states have (on average 1.5502183406113537) internal successors, (355), 230 states have internal predecessors, (355), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-06 23:05:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:12,012 INFO L93 Difference]: Finished difference Result 627 states and 1129 transitions. [2023-11-06 23:05:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:05:12,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) Word has length 580 [2023-11-06 23:05:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:12,028 INFO L225 Difference]: With dead ends: 627 [2023-11-06 23:05:12,029 INFO L226 Difference]: Without dead ends: 313 [2023-11-06 23:05:12,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 579 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 23:05:12,040 INFO L413 NwaCegarLoop]: 518 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, 518 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 23:05:12,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:05:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-11-06 23:05:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2023-11-06 23:05:12,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 226 states have (on average 1.5398230088495575) internal successors, (348), 226 states have internal predecessors, (348), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-06 23:05:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 518 transitions. [2023-11-06 23:05:12,138 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 518 transitions. Word has length 580 [2023-11-06 23:05:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:12,139 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 518 transitions. [2023-11-06 23:05:12,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-06 23:05:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 518 transitions. [2023-11-06 23:05:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-06 23:05:12,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:12,158 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:12,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:05:12,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:12,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:12,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1788339834, now seen corresponding path program 1 times [2023-11-06 23:05:12,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:12,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665750417] [2023-11-06 23:05:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:12,648 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:12,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825122701] [2023-11-06 23:05:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:12,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:12,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:12,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:12,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:05:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:13,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:05:13,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:13,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665750417] [2023-11-06 23:05:13,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:13,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825122701] [2023-11-06 23:05:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825122701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:13,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:13,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:13,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573961574] [2023-11-06 23:05:13,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:13,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:13,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:13,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:13,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:13,376 INFO L87 Difference]: Start difference. First operand 313 states and 518 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:13,534 INFO L93 Difference]: Finished difference Result 831 states and 1373 transitions. [2023-11-06 23:05:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:13,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 580 [2023-11-06 23:05:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:13,546 INFO L225 Difference]: With dead ends: 831 [2023-11-06 23:05:13,547 INFO L226 Difference]: Without dead ends: 521 [2023-11-06 23:05:13,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 578 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 23:05:13,550 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 336 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:13,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1018 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:05:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2023-11-06 23:05:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 518. [2023-11-06 23:05:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 386 states have (on average 1.5466321243523315) internal successors, (597), 387 states have internal predecessors, (597), 129 states have call successors, (129), 2 states have call predecessors, (129), 2 states have return successors, (129), 128 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-06 23:05:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 855 transitions. [2023-11-06 23:05:13,659 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 855 transitions. Word has length 580 [2023-11-06 23:05:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:13,663 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 855 transitions. [2023-11-06 23:05:13,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 855 transitions. [2023-11-06 23:05:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-06 23:05:13,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:13,686 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:13,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 23:05:13,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:13,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash -54235384, now seen corresponding path program 1 times [2023-11-06 23:05:13,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:13,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191538995] [2023-11-06 23:05:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:13,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:14,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:14,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219072328] [2023-11-06 23:05:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:14,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:14,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:14,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:14,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:05:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:14,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:05:14,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:14,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:14,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:14,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191538995] [2023-11-06 23:05:14,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219072328] [2023-11-06 23:05:14,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219072328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:14,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:14,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:14,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728671433] [2023-11-06 23:05:14,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:14,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:14,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:14,760 INFO L87 Difference]: Start difference. First operand 518 states and 855 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:14,891 INFO L93 Difference]: Finished difference Result 1351 states and 2232 transitions. [2023-11-06 23:05:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 580 [2023-11-06 23:05:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:14,947 INFO L225 Difference]: With dead ends: 1351 [2023-11-06 23:05:14,948 INFO L226 Difference]: Without dead ends: 836 [2023-11-06 23:05:14,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 578 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 23:05:14,953 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 282 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:14,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 1055 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:05:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2023-11-06 23:05:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 832. [2023-11-06 23:05:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 690 states have (on average 1.5898550724637681) internal successors, (1097), 693 states have internal predecessors, (1097), 137 states have call successors, (137), 4 states have call predecessors, (137), 4 states have return successors, (137), 134 states have call predecessors, (137), 137 states have call successors, (137) [2023-11-06 23:05:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1371 transitions. [2023-11-06 23:05:15,056 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1371 transitions. Word has length 580 [2023-11-06 23:05:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:15,063 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1371 transitions. [2023-11-06 23:05:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1371 transitions. [2023-11-06 23:05:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-06 23:05:15,084 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:15,085 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:15,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:15,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 23:05:15,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:15,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:15,295 INFO L85 PathProgramCache]: Analyzing trace with hash 22665414, now seen corresponding path program 1 times [2023-11-06 23:05:15,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:15,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432320776] [2023-11-06 23:05:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:15,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:15,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:15,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831579558] [2023-11-06 23:05:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:15,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:15,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:15,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:05:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:15,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:05:15,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:16,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432320776] [2023-11-06 23:05:16,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:16,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831579558] [2023-11-06 23:05:16,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831579558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:16,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:16,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:16,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494192429] [2023-11-06 23:05:16,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:16,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:16,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:16,080 INFO L87 Difference]: Start difference. First operand 832 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:16,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:16,238 INFO L93 Difference]: Finished difference Result 2490 states and 4107 transitions. [2023-11-06 23:05:16,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:16,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 580 [2023-11-06 23:05:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:16,252 INFO L225 Difference]: With dead ends: 2490 [2023-11-06 23:05:16,252 INFO L226 Difference]: Without dead ends: 1661 [2023-11-06 23:05:16,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 578 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 23:05:16,256 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 471 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:16,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1022 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:05:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2023-11-06 23:05:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1659. [2023-11-06 23:05:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1376 states have (on average 1.5872093023255813) internal successors, (2184), 1382 states have internal predecessors, (2184), 274 states have call successors, (274), 8 states have call predecessors, (274), 8 states have return successors, (274), 268 states have call predecessors, (274), 274 states have call successors, (274) [2023-11-06 23:05:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2732 transitions. [2023-11-06 23:05:16,428 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2732 transitions. Word has length 580 [2023-11-06 23:05:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:16,430 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 2732 transitions. [2023-11-06 23:05:16,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:16,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2732 transitions. [2023-11-06 23:05:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 581 [2023-11-06 23:05:16,438 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:16,439 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:16,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:16,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:16,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:16,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:16,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1349141884, now seen corresponding path program 1 times [2023-11-06 23:05:16,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:16,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864189559] [2023-11-06 23:05:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:16,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:16,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:16,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744345037] [2023-11-06 23:05:16,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:16,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:16,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:16,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:16,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:05:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:17,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:05:17,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:19,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:19,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:19,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864189559] [2023-11-06 23:05:19,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:19,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744345037] [2023-11-06 23:05:19,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744345037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:19,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:19,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153150516] [2023-11-06 23:05:19,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:19,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:19,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:19,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:19,324 INFO L87 Difference]: Start difference. First operand 1659 states and 2732 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:19,971 INFO L93 Difference]: Finished difference Result 4636 states and 7650 transitions. [2023-11-06 23:05:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:05:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 580 [2023-11-06 23:05:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:19,995 INFO L225 Difference]: With dead ends: 4636 [2023-11-06 23:05:19,995 INFO L226 Difference]: Without dead ends: 2980 [2023-11-06 23:05:20,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:20,004 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 414 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:20,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 1529 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:05:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2023-11-06 23:05:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 1818. [2023-11-06 23:05:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1447 states have (on average 1.5639253628196268) internal successors, (2263), 1453 states have internal predecessors, (2263), 359 states have call successors, (359), 11 states have call predecessors, (359), 11 states have return successors, (359), 353 states have call predecessors, (359), 359 states have call successors, (359) [2023-11-06 23:05:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2981 transitions. [2023-11-06 23:05:20,290 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2981 transitions. Word has length 580 [2023-11-06 23:05:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:20,291 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 2981 transitions. [2023-11-06 23:05:20,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:20,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2981 transitions. [2023-11-06 23:05:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-11-06 23:05:20,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:20,300 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:20,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:20,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:20,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:20,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:20,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1015843755, now seen corresponding path program 1 times [2023-11-06 23:05:20,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:20,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18640228] [2023-11-06 23:05:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:20,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:20,608 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:20,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542971540] [2023-11-06 23:05:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:20,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:20,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:20,610 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:20,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:05:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:21,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:05:21,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:21,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:21,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18640228] [2023-11-06 23:05:21,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542971540] [2023-11-06 23:05:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542971540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:21,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:21,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:05:21,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285397667] [2023-11-06 23:05:21,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:21,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:21,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:21,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:21,262 INFO L87 Difference]: Start difference. First operand 1818 states and 2981 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:21,614 INFO L93 Difference]: Finished difference Result 5372 states and 8763 transitions. [2023-11-06 23:05:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:21,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 581 [2023-11-06 23:05:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:21,642 INFO L225 Difference]: With dead ends: 5372 [2023-11-06 23:05:21,642 INFO L226 Difference]: Without dead ends: 3716 [2023-11-06 23:05:21,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:21,649 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 698 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:21,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 1775 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:05:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2023-11-06 23:05:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 2986. [2023-11-06 23:05:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2567 states have (on average 1.5944682508765096) internal successors, (4093), 2581 states have internal predecessors, (4093), 399 states have call successors, (399), 19 states have call predecessors, (399), 19 states have return successors, (399), 385 states have call predecessors, (399), 399 states have call successors, (399) [2023-11-06 23:05:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 4891 transitions. [2023-11-06 23:05:21,968 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 4891 transitions. Word has length 581 [2023-11-06 23:05:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:21,969 INFO L495 AbstractCegarLoop]: Abstraction has 2986 states and 4891 transitions. [2023-11-06 23:05:21,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 4891 transitions. [2023-11-06 23:05:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-11-06 23:05:21,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:21,979 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:21,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:22,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:22,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:22,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:22,189 INFO L85 PathProgramCache]: Analyzing trace with hash -582460049, now seen corresponding path program 1 times [2023-11-06 23:05:22,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:22,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605416884] [2023-11-06 23:05:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:22,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:22,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:22,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142620566] [2023-11-06 23:05:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:22,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:22,285 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:22,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:05:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:22,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:22,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:22,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:22,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:22,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605416884] [2023-11-06 23:05:22,902 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:22,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142620566] [2023-11-06 23:05:22,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142620566] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:22,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:22,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:05:22,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018332882] [2023-11-06 23:05:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:22,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:22,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:22,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:22,907 INFO L87 Difference]: Start difference. First operand 2986 states and 4891 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:23,716 INFO L93 Difference]: Finished difference Result 9574 states and 15533 transitions. [2023-11-06 23:05:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:05:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 581 [2023-11-06 23:05:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:23,762 INFO L225 Difference]: With dead ends: 9574 [2023-11-06 23:05:23,763 INFO L226 Difference]: Without dead ends: 6750 [2023-11-06 23:05:23,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 581 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:05:23,772 INFO L413 NwaCegarLoop]: 1449 mSDtfsCounter, 1458 mSDsluCounter, 2687 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 4136 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:23,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1458 Valid, 4136 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:05:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6750 states. [2023-11-06 23:05:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6750 to 3198. [2023-11-06 23:05:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2822 states have (on average 1.6229624379872432) internal successors, (4580), 2828 states have internal predecessors, (4580), 359 states have call successors, (359), 16 states have call predecessors, (359), 16 states have return successors, (359), 353 states have call predecessors, (359), 359 states have call successors, (359) [2023-11-06 23:05:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 5298 transitions. [2023-11-06 23:05:24,194 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 5298 transitions. Word has length 581 [2023-11-06 23:05:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:24,195 INFO L495 AbstractCegarLoop]: Abstraction has 3198 states and 5298 transitions. [2023-11-06 23:05:24,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 5298 transitions. [2023-11-06 23:05:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-11-06 23:05:24,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:24,210 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:24,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 23:05:24,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:24,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:24,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:24,421 INFO L85 PathProgramCache]: Analyzing trace with hash 429567533, now seen corresponding path program 1 times [2023-11-06 23:05:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:24,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392038551] [2023-11-06 23:05:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:24,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:24,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:24,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995590614] [2023-11-06 23:05:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:24,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:24,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:24,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:24,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:05:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:25,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:05:25,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:25,170 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:25,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392038551] [2023-11-06 23:05:25,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995590614] [2023-11-06 23:05:25,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995590614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:25,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:25,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:25,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531787129] [2023-11-06 23:05:25,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:25,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:25,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:25,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:25,176 INFO L87 Difference]: Start difference. First operand 3198 states and 5298 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:25,400 INFO L93 Difference]: Finished difference Result 8356 states and 13792 transitions. [2023-11-06 23:05:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:25,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 581 [2023-11-06 23:05:25,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:25,436 INFO L225 Difference]: With dead ends: 8356 [2023-11-06 23:05:25,436 INFO L226 Difference]: Without dead ends: 5324 [2023-11-06 23:05:25,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 579 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 23:05:25,446 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 505 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:25,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 1122 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:05:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2023-11-06 23:05:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5322. [2023-11-06 23:05:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5322 states, 4660 states have (on average 1.5969957081545065) internal successors, (7442), 4672 states have internal predecessors, (7442), 633 states have call successors, (633), 28 states have call predecessors, (633), 28 states have return successors, (633), 621 states have call predecessors, (633), 633 states have call successors, (633) [2023-11-06 23:05:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5322 states to 5322 states and 8708 transitions. [2023-11-06 23:05:25,913 INFO L78 Accepts]: Start accepts. Automaton has 5322 states and 8708 transitions. Word has length 581 [2023-11-06 23:05:25,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:25,914 INFO L495 AbstractCegarLoop]: Abstraction has 5322 states and 8708 transitions. [2023-11-06 23:05:25,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5322 states and 8708 transitions. [2023-11-06 23:05:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2023-11-06 23:05:25,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:25,932 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:25,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:26,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:26,147 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:26,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash -641784407, now seen corresponding path program 1 times [2023-11-06 23:05:26,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:26,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471561917] [2023-11-06 23:05:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:26,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:26,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801016051] [2023-11-06 23:05:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:26,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:26,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:26,241 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:26,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:05:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:05:26,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:26,920 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:26,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471561917] [2023-11-06 23:05:26,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801016051] [2023-11-06 23:05:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801016051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:26,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:26,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:05:26,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751116258] [2023-11-06 23:05:26,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:26,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:26,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:26,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:26,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:26,928 INFO L87 Difference]: Start difference. First operand 5322 states and 8708 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:27,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:27,352 INFO L93 Difference]: Finished difference Result 11278 states and 18398 transitions. [2023-11-06 23:05:27,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:05:27,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 581 [2023-11-06 23:05:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:27,389 INFO L225 Difference]: With dead ends: 11278 [2023-11-06 23:05:27,390 INFO L226 Difference]: Without dead ends: 5770 [2023-11-06 23:05:27,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:27,402 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 711 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:27,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1694 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:05:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2023-11-06 23:05:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4996. [2023-11-06 23:05:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4996 states, 4334 states have (on average 1.582602676511306) internal successors, (6859), 4346 states have internal predecessors, (6859), 633 states have call successors, (633), 28 states have call predecessors, (633), 28 states have return successors, (633), 621 states have call predecessors, (633), 633 states have call successors, (633) [2023-11-06 23:05:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 8125 transitions. [2023-11-06 23:05:27,886 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 8125 transitions. Word has length 581 [2023-11-06 23:05:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:27,887 INFO L495 AbstractCegarLoop]: Abstraction has 4996 states and 8125 transitions. [2023-11-06 23:05:27,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:27,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 8125 transitions. [2023-11-06 23:05:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2023-11-06 23:05:27,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:27,901 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:27,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:28,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:28,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:28,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:28,112 INFO L85 PathProgramCache]: Analyzing trace with hash -424201546, now seen corresponding path program 1 times [2023-11-06 23:05:28,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:28,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068069] [2023-11-06 23:05:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:28,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:28,225 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:28,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327950938] [2023-11-06 23:05:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:28,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:28,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:28,227 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:28,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:05:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:28,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:28,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:28,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:28,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:28,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068069] [2023-11-06 23:05:28,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:28,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327950938] [2023-11-06 23:05:28,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327950938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:28,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:28,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:05:28,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888738176] [2023-11-06 23:05:28,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:28,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:28,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:28,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:28,890 INFO L87 Difference]: Start difference. First operand 4996 states and 8125 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:29,444 INFO L93 Difference]: Finished difference Result 11486 states and 18569 transitions. [2023-11-06 23:05:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:05:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 582 [2023-11-06 23:05:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:29,496 INFO L225 Difference]: With dead ends: 11486 [2023-11-06 23:05:29,496 INFO L226 Difference]: Without dead ends: 6656 [2023-11-06 23:05:29,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:29,511 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 715 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:29,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 2725 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:05:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2023-11-06 23:05:30,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 4996. [2023-11-06 23:05:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4996 states, 4334 states have (on average 1.5807568066451316) internal successors, (6851), 4346 states have internal predecessors, (6851), 633 states have call successors, (633), 28 states have call predecessors, (633), 28 states have return successors, (633), 621 states have call predecessors, (633), 633 states have call successors, (633) [2023-11-06 23:05:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 8117 transitions. [2023-11-06 23:05:30,034 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 8117 transitions. Word has length 582 [2023-11-06 23:05:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:30,035 INFO L495 AbstractCegarLoop]: Abstraction has 4996 states and 8117 transitions. [2023-11-06 23:05:30,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 8117 transitions. [2023-11-06 23:05:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2023-11-06 23:05:30,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:30,049 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:30,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:30,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:05:30,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:30,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 151104525, now seen corresponding path program 1 times [2023-11-06 23:05:30,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:30,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395594037] [2023-11-06 23:05:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:30,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:30,375 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:30,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120347092] [2023-11-06 23:05:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:30,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:30,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:30,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:30,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:05:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:30,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:05:30,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:31,884 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:31,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:31,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395594037] [2023-11-06 23:05:31,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:31,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120347092] [2023-11-06 23:05:31,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120347092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:31,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:31,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960583122] [2023-11-06 23:05:31,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:31,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:31,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:31,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:31,889 INFO L87 Difference]: Start difference. First operand 4996 states and 8117 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:32,638 INFO L93 Difference]: Finished difference Result 16104 states and 26179 transitions. [2023-11-06 23:05:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:05:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 582 [2023-11-06 23:05:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:32,676 INFO L225 Difference]: With dead ends: 16104 [2023-11-06 23:05:32,677 INFO L226 Difference]: Without dead ends: 11274 [2023-11-06 23:05:32,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:32,692 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 680 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1684 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:32,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 1684 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:05:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2023-11-06 23:05:33,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 9764. [2023-11-06 23:05:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 8530 states have (on average 1.5842907385697538) internal successors, (13514), 8554 states have internal predecessors, (13514), 1181 states have call successors, (1181), 52 states have call predecessors, (1181), 52 states have return successors, (1181), 1157 states have call predecessors, (1181), 1181 states have call successors, (1181) [2023-11-06 23:05:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 15876 transitions. [2023-11-06 23:05:33,597 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 15876 transitions. Word has length 582 [2023-11-06 23:05:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:33,599 INFO L495 AbstractCegarLoop]: Abstraction has 9764 states and 15876 transitions. [2023-11-06 23:05:33,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 15876 transitions. [2023-11-06 23:05:33,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2023-11-06 23:05:33,615 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:33,616 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:33,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:33,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:05:33,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:33,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:33,831 INFO L85 PathProgramCache]: Analyzing trace with hash -991397941, now seen corresponding path program 1 times [2023-11-06 23:05:33,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:33,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880184829] [2023-11-06 23:05:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:33,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:33,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:33,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605850710] [2023-11-06 23:05:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:33,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:33,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:33,926 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:33,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:05:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:34,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:34,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:35,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 1372 proven. 240 refuted. 0 times theorem prover too weak. 12668 trivial. 0 not checked. [2023-11-06 23:05:35,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 12 proven. 240 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-06 23:05:36,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880184829] [2023-11-06 23:05:36,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605850710] [2023-11-06 23:05:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605850710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:36,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:36,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:05:36,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887517512] [2023-11-06 23:05:36,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:36,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:36,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:36,036 INFO L87 Difference]: Start difference. First operand 9764 states and 15876 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (165), 2 states have call predecessors, (165), 4 states have return successors, (166), 2 states have call predecessors, (166), 2 states have call successors, (166) [2023-11-06 23:05:37,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:37,172 INFO L93 Difference]: Finished difference Result 15496 states and 25148 transitions. [2023-11-06 23:05:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:05:37,173 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (165), 2 states have call predecessors, (165), 4 states have return successors, (166), 2 states have call predecessors, (166), 2 states have call successors, (166) Word has length 582 [2023-11-06 23:05:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:37,200 INFO L225 Difference]: With dead ends: 15496 [2023-11-06 23:05:37,200 INFO L226 Difference]: Without dead ends: 5896 [2023-11-06 23:05:37,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1156 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 23:05:37,223 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 539 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:37,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1089 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:05:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2023-11-06 23:05:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 5860. [2023-11-06 23:05:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5860 states, 4689 states have (on average 1.5363616975901044) internal successors, (7204), 4697 states have internal predecessors, (7204), 1117 states have call successors, (1117), 53 states have call predecessors, (1117), 53 states have return successors, (1117), 1109 states have call predecessors, (1117), 1117 states have call successors, (1117) [2023-11-06 23:05:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5860 states to 5860 states and 9438 transitions. [2023-11-06 23:05:38,079 INFO L78 Accepts]: Start accepts. Automaton has 5860 states and 9438 transitions. Word has length 582 [2023-11-06 23:05:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:38,081 INFO L495 AbstractCegarLoop]: Abstraction has 5860 states and 9438 transitions. [2023-11-06 23:05:38,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (165), 2 states have call predecessors, (165), 4 states have return successors, (166), 2 states have call predecessors, (166), 2 states have call successors, (166) [2023-11-06 23:05:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5860 states and 9438 transitions. [2023-11-06 23:05:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2023-11-06 23:05:38,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:38,093 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:38,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:05:38,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:38,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1907332401, now seen corresponding path program 1 times [2023-11-06 23:05:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071582040] [2023-11-06 23:05:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:38,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:38,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84701625] [2023-11-06 23:05:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:38,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:38,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:38,410 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:38,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:05:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:39,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:39,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 1968 proven. 234 refuted. 0 times theorem prover too weak. 12078 trivial. 0 not checked. [2023-11-06 23:05:39,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 18 proven. 234 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-06 23:05:40,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:40,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071582040] [2023-11-06 23:05:40,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:40,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84701625] [2023-11-06 23:05:40,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84701625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:40,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:40,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:05:40,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507445284] [2023-11-06 23:05:40,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:40,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:40,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:40,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:40,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:40,620 INFO L87 Difference]: Start difference. First operand 5860 states and 9438 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (163), 2 states have call predecessors, (163), 4 states have return successors, (164), 2 states have call predecessors, (164), 2 states have call successors, (164) [2023-11-06 23:05:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:41,467 INFO L93 Difference]: Finished difference Result 9205 states and 14828 transitions. [2023-11-06 23:05:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:05:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (163), 2 states have call predecessors, (163), 4 states have return successors, (164), 2 states have call predecessors, (164), 2 states have call successors, (164) Word has length 582 [2023-11-06 23:05:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:41,480 INFO L225 Difference]: With dead ends: 9205 [2023-11-06 23:05:41,480 INFO L226 Difference]: Without dead ends: 2861 [2023-11-06 23:05:41,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1156 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 23:05:41,498 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 467 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:41,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1095 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:05:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2023-11-06 23:05:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2687. [2023-11-06 23:05:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2047 states have (on average 1.4855886663409867) internal successors, (3041), 2051 states have internal predecessors, (3041), 601 states have call successors, (601), 38 states have call predecessors, (601), 38 states have return successors, (601), 597 states have call predecessors, (601), 601 states have call successors, (601) [2023-11-06 23:05:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4243 transitions. [2023-11-06 23:05:41,854 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4243 transitions. Word has length 582 [2023-11-06 23:05:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:41,855 INFO L495 AbstractCegarLoop]: Abstraction has 2687 states and 4243 transitions. [2023-11-06 23:05:41,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (163), 2 states have call predecessors, (163), 4 states have return successors, (164), 2 states have call predecessors, (164), 2 states have call successors, (164) [2023-11-06 23:05:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4243 transitions. [2023-11-06 23:05:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2023-11-06 23:05:41,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:41,864 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:41,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:42,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:42,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1399735796, now seen corresponding path program 1 times [2023-11-06 23:05:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:42,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381122390] [2023-11-06 23:05:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:42,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:42,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:42,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121574345] [2023-11-06 23:05:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:42,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:42,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:42,173 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:42,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:05:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:42,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:42,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:42,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:42,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:42,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381122390] [2023-11-06 23:05:42,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121574345] [2023-11-06 23:05:42,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121574345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:42,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:42,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:05:42,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637244369] [2023-11-06 23:05:42,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:42,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:05:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:42,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:05:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:05:42,907 INFO L87 Difference]: Start difference. First operand 2687 states and 4243 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:43,771 INFO L93 Difference]: Finished difference Result 6125 states and 9668 transitions. [2023-11-06 23:05:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:05:43,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 582 [2023-11-06 23:05:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:43,787 INFO L225 Difference]: With dead ends: 6125 [2023-11-06 23:05:43,787 INFO L226 Difference]: Without dead ends: 3608 [2023-11-06 23:05:43,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:43,794 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 814 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:43,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 3045 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:05:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2023-11-06 23:05:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 2666. [2023-11-06 23:05:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2026 states have (on average 1.4876604146100691) internal successors, (3014), 2030 states have internal predecessors, (3014), 601 states have call successors, (601), 38 states have call predecessors, (601), 38 states have return successors, (601), 597 states have call predecessors, (601), 601 states have call successors, (601) [2023-11-06 23:05:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 4216 transitions. [2023-11-06 23:05:44,163 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 4216 transitions. Word has length 582 [2023-11-06 23:05:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:44,165 INFO L495 AbstractCegarLoop]: Abstraction has 2666 states and 4216 transitions. [2023-11-06 23:05:44,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 4216 transitions. [2023-11-06 23:05:44,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2023-11-06 23:05:44,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:44,174 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:44,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:05:44,388 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:44,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2088679600, now seen corresponding path program 1 times [2023-11-06 23:05:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:44,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768068520] [2023-11-06 23:05:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:44,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:44,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:44,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863033993] [2023-11-06 23:05:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:44,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:44,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:44,494 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:44,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:05:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:45,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:45,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7222 proven. 123 refuted. 0 times theorem prover too weak. 6935 trivial. 0 not checked. [2023-11-06 23:05:45,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 129 proven. 123 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-06 23:05:46,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:46,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768068520] [2023-11-06 23:05:46,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863033993] [2023-11-06 23:05:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863033993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:46,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:46,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:05:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861900519] [2023-11-06 23:05:46,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:46,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:05:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:05:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:46,014 INFO L87 Difference]: Start difference. First operand 2666 states and 4216 transitions. Second operand has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) [2023-11-06 23:05:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:46,790 INFO L93 Difference]: Finished difference Result 5234 states and 8239 transitions. [2023-11-06 23:05:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:05:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) Word has length 583 [2023-11-06 23:05:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:46,804 INFO L225 Difference]: With dead ends: 5234 [2023-11-06 23:05:46,804 INFO L226 Difference]: Without dead ends: 2740 [2023-11-06 23:05:46,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1158 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:05:46,810 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 631 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:46,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1089 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:05:46,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2023-11-06 23:05:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2674. [2023-11-06 23:05:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2037 states have (on average 1.4820814923907708) internal successors, (3019), 2041 states have internal predecessors, (3019), 593 states have call successors, (593), 43 states have call predecessors, (593), 43 states have return successors, (593), 589 states have call predecessors, (593), 593 states have call successors, (593) [2023-11-06 23:05:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 4205 transitions. [2023-11-06 23:05:47,203 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 4205 transitions. Word has length 583 [2023-11-06 23:05:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:47,209 INFO L495 AbstractCegarLoop]: Abstraction has 2674 states and 4205 transitions. [2023-11-06 23:05:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (126), 2 states have call predecessors, (126), 4 states have return successors, (127), 2 states have call predecessors, (127), 2 states have call successors, (127) [2023-11-06 23:05:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 4205 transitions. [2023-11-06 23:05:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 585 [2023-11-06 23:05:47,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:47,222 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:47,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:47,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:05:47,433 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:47,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:47,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1508678349, now seen corresponding path program 1 times [2023-11-06 23:05:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:47,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406706586] [2023-11-06 23:05:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:47,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:47,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1289000665] [2023-11-06 23:05:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:47,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:47,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:47,539 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:47,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:05:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:48,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:48,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:49,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406706586] [2023-11-06 23:05:49,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289000665] [2023-11-06 23:05:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289000665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:49,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:49,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:49,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428763717] [2023-11-06 23:05:49,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:49,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:05:49,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:05:50,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:05:50,000 INFO L87 Difference]: Start difference. First operand 2674 states and 4205 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:50,525 INFO L93 Difference]: Finished difference Result 7676 states and 12101 transitions. [2023-11-06 23:05:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:50,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 584 [2023-11-06 23:05:50,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:50,545 INFO L225 Difference]: With dead ends: 7676 [2023-11-06 23:05:50,545 INFO L226 Difference]: Without dead ends: 5172 [2023-11-06 23:05:50,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 581 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 23:05:50,551 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 566 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:50,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 992 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:05:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2023-11-06 23:05:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 5170. [2023-11-06 23:05:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5170 states, 3989 states have (on average 1.4863374279267987) internal successors, (5929), 3997 states have internal predecessors, (5929), 1101 states have call successors, (1101), 79 states have call predecessors, (1101), 79 states have return successors, (1101), 1093 states have call predecessors, (1101), 1101 states have call successors, (1101) [2023-11-06 23:05:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 8131 transitions. [2023-11-06 23:05:51,162 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 8131 transitions. Word has length 584 [2023-11-06 23:05:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:51,164 INFO L495 AbstractCegarLoop]: Abstraction has 5170 states and 8131 transitions. [2023-11-06 23:05:51,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 8131 transitions. [2023-11-06 23:05:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2023-11-06 23:05:51,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:51,177 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:51,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:51,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:05:51,387 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:51,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1360062383, now seen corresponding path program 1 times [2023-11-06 23:05:51,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:51,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121841230] [2023-11-06 23:05:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:51,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:51,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298034680] [2023-11-06 23:05:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:51,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:51,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:51,468 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:51,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:05:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:52,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:05:52,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:05:52,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:52,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121841230] [2023-11-06 23:05:52,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:52,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298034680] [2023-11-06 23:05:52,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298034680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:52,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:52,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658905021] [2023-11-06 23:05:52,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:52,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:52,188 INFO L87 Difference]: Start difference. First operand 5170 states and 8131 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:52,834 INFO L93 Difference]: Finished difference Result 13348 states and 21069 transitions. [2023-11-06 23:05:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:52,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 585 [2023-11-06 23:05:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:52,862 INFO L225 Difference]: With dead ends: 13348 [2023-11-06 23:05:52,863 INFO L226 Difference]: Without dead ends: 8354 [2023-11-06 23:05:52,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 583 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 23:05:52,873 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 265 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:52,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1005 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:05:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2023-11-06 23:05:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 8336. [2023-11-06 23:05:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8336 states, 7107 states have (on average 1.531307161953004) internal successors, (10883), 7131 states have internal predecessors, (10883), 1133 states have call successors, (1133), 95 states have call predecessors, (1133), 95 states have return successors, (1133), 1109 states have call predecessors, (1133), 1133 states have call successors, (1133) [2023-11-06 23:05:53,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8336 states to 8336 states and 13149 transitions. [2023-11-06 23:05:53,802 INFO L78 Accepts]: Start accepts. Automaton has 8336 states and 13149 transitions. Word has length 585 [2023-11-06 23:05:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:53,803 INFO L495 AbstractCegarLoop]: Abstraction has 8336 states and 13149 transitions. [2023-11-06 23:05:53,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:05:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8336 states and 13149 transitions. [2023-11-06 23:05:53,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2023-11-06 23:05:53,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:53,816 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:53,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:54,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:05:54,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:54,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:54,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1551526865, now seen corresponding path program 1 times [2023-11-06 23:05:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:54,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982819934] [2023-11-06 23:05:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:54,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:54,123 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:54,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911636940] [2023-11-06 23:05:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:54,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:54,126 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:54,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:05:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:54,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:05:54,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 744 proven. 246 refuted. 0 times theorem prover too weak. 13290 trivial. 0 not checked. [2023-11-06 23:05:55,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 6 proven. 246 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-06 23:05:56,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982819934] [2023-11-06 23:05:56,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911636940] [2023-11-06 23:05:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911636940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:05:56,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:56,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:05:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731411331] [2023-11-06 23:05:56,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:56,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:05:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:05:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:05:56,133 INFO L87 Difference]: Start difference. First operand 8336 states and 13149 transitions. Second operand has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 3 states have call predecessors, (168), 3 states have call successors, (168) [2023-11-06 23:05:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:57,163 INFO L93 Difference]: Finished difference Result 13458 states and 21133 transitions. [2023-11-06 23:05:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:05:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 3 states have call predecessors, (168), 3 states have call successors, (168) Word has length 585 [2023-11-06 23:05:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:57,185 INFO L225 Difference]: With dead ends: 13458 [2023-11-06 23:05:57,185 INFO L226 Difference]: Without dead ends: 5292 [2023-11-06 23:05:57,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1172 GetRequests, 1162 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:05:57,198 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 862 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:57,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [864 Valid, 1038 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:05:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5292 states. [2023-11-06 23:05:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5292 to 5238. [2023-11-06 23:05:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5238 states, 4040 states have (on average 1.4638613861386138) internal successors, (5914), 4048 states have internal predecessors, (5914), 1101 states have call successors, (1101), 96 states have call predecessors, (1101), 96 states have return successors, (1101), 1093 states have call predecessors, (1101), 1101 states have call successors, (1101) [2023-11-06 23:05:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 8116 transitions. [2023-11-06 23:05:58,011 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 8116 transitions. Word has length 585 [2023-11-06 23:05:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:58,012 INFO L495 AbstractCegarLoop]: Abstraction has 5238 states and 8116 transitions. [2023-11-06 23:05:58,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (167), 2 states have call predecessors, (167), 4 states have return successors, (168), 3 states have call predecessors, (168), 3 states have call successors, (168) [2023-11-06 23:05:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 8116 transitions. [2023-11-06 23:05:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-06 23:05:58,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:58,021 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:05:58,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:58,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 23:05:58,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:58,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:58,237 INFO L85 PathProgramCache]: Analyzing trace with hash -957348870, now seen corresponding path program 1 times [2023-11-06 23:05:58,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:58,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386723821] [2023-11-06 23:05:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:58,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:58,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975641995] [2023-11-06 23:05:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:58,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:58,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:58,323 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:58,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:05:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:59,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:05:59,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7218 proven. 129 refuted. 0 times theorem prover too weak. 6933 trivial. 0 not checked. [2023-11-06 23:05:59,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 123 proven. 129 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-06 23:06:00,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:00,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386723821] [2023-11-06 23:06:00,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:00,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975641995] [2023-11-06 23:06:00,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975641995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:06:00,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:00,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 23:06:00,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14335824] [2023-11-06 23:06:00,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:06:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:06:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:06:00,073 INFO L87 Difference]: Start difference. First operand 5238 states and 8116 transitions. Second operand has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-06 23:06:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:01,742 INFO L93 Difference]: Finished difference Result 10620 states and 16358 transitions. [2023-11-06 23:06:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:06:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) Word has length 586 [2023-11-06 23:06:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:01,761 INFO L225 Difference]: With dead ends: 10620 [2023-11-06 23:06:01,762 INFO L226 Difference]: Without dead ends: 5562 [2023-11-06 23:06:01,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1163 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:06:01,772 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 921 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:01,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 1685 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:06:01,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5562 states. [2023-11-06 23:06:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5562 to 5250. [2023-11-06 23:06:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5250 states, 4059 states have (on average 1.4390243902439024) internal successors, (5841), 4067 states have internal predecessors, (5841), 1085 states have call successors, (1085), 105 states have call predecessors, (1085), 105 states have return successors, (1085), 1077 states have call predecessors, (1085), 1085 states have call successors, (1085) [2023-11-06 23:06:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5250 states to 5250 states and 8011 transitions. [2023-11-06 23:06:02,476 INFO L78 Accepts]: Start accepts. Automaton has 5250 states and 8011 transitions. Word has length 586 [2023-11-06 23:06:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:02,477 INFO L495 AbstractCegarLoop]: Abstraction has 5250 states and 8011 transitions. [2023-11-06 23:06:02,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.625) internal successors, (173), 8 states have internal predecessors, (173), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-06 23:06:02,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5250 states and 8011 transitions. [2023-11-06 23:06:02,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-06 23:06:02,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:02,486 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:02,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:02,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:02,697 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:02,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:02,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1952871166, now seen corresponding path program 1 times [2023-11-06 23:06:02,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:02,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819714964] [2023-11-06 23:06:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:02,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:02,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:02,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34422779] [2023-11-06 23:06:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:02,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:02,818 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:02,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:06:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:03,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:06:03,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:06:04,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819714964] [2023-11-06 23:06:04,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:04,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34422779] [2023-11-06 23:06:04,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34422779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:04,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:04,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:06:04,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709853187] [2023-11-06 23:06:04,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:04,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:06:04,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:06:04,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:06:04,894 INFO L87 Difference]: Start difference. First operand 5250 states and 8011 transitions. Second operand has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:06,133 INFO L93 Difference]: Finished difference Result 14560 states and 22156 transitions. [2023-11-06 23:06:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:06:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 586 [2023-11-06 23:06:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:06,150 INFO L225 Difference]: With dead ends: 14560 [2023-11-06 23:06:06,151 INFO L226 Difference]: Without dead ends: 9494 [2023-11-06 23:06:06,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:06:06,160 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 516 mSDsluCounter, 1821 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:06,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 2407 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:06:06,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9494 states. [2023-11-06 23:06:06,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9494 to 8710. [2023-11-06 23:06:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 7423 states have (on average 1.4801293277650545) internal successors, (10987), 7447 states have internal predecessors, (10987), 1149 states have call successors, (1149), 137 states have call predecessors, (1149), 137 states have return successors, (1149), 1125 states have call predecessors, (1149), 1149 states have call successors, (1149) [2023-11-06 23:06:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 13285 transitions. [2023-11-06 23:06:07,018 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 13285 transitions. Word has length 586 [2023-11-06 23:06:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:07,020 INFO L495 AbstractCegarLoop]: Abstraction has 8710 states and 13285 transitions. [2023-11-06 23:06:07,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 13285 transitions. [2023-11-06 23:06:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-06 23:06:07,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:07,032 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:07,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:07,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:07,238 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:07,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:07,239 INFO L85 PathProgramCache]: Analyzing trace with hash -958718082, now seen corresponding path program 1 times [2023-11-06 23:06:07,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:07,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868678400] [2023-11-06 23:06:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:07,326 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:07,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806303437] [2023-11-06 23:06:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:07,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:07,328 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:07,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:06:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:08,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:06:08,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:06:08,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:08,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:08,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868678400] [2023-11-06 23:06:08,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806303437] [2023-11-06 23:06:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806303437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:08,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:08,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:06:08,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300663625] [2023-11-06 23:06:08,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:08,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:06:08,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:06:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:06:08,942 INFO L87 Difference]: Start difference. First operand 8710 states and 13285 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:11,155 INFO L93 Difference]: Finished difference Result 31036 states and 47135 transitions. [2023-11-06 23:06:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:06:11,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 586 [2023-11-06 23:06:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:11,208 INFO L225 Difference]: With dead ends: 31036 [2023-11-06 23:06:11,208 INFO L226 Difference]: Without dead ends: 22510 [2023-11-06 23:06:11,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:06:11,226 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 1718 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:11,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 2945 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:06:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22510 states. [2023-11-06 23:06:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22510 to 13794. [2023-11-06 23:06:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13794 states, 11475 states have (on average 1.4681481481481482) internal successors, (16847), 11491 states have internal predecessors, (16847), 2085 states have call successors, (2085), 233 states have call predecessors, (2085), 233 states have return successors, (2085), 2069 states have call predecessors, (2085), 2085 states have call successors, (2085) [2023-11-06 23:06:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13794 states to 13794 states and 21017 transitions. [2023-11-06 23:06:13,306 INFO L78 Accepts]: Start accepts. Automaton has 13794 states and 21017 transitions. Word has length 586 [2023-11-06 23:06:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:13,307 INFO L495 AbstractCegarLoop]: Abstraction has 13794 states and 21017 transitions. [2023-11-06 23:06:13,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 13794 states and 21017 transitions. [2023-11-06 23:06:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-06 23:06:13,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:13,318 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:13,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:13,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:13,519 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:13,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash -31299334, now seen corresponding path program 1 times [2023-11-06 23:06:13,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:13,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272985878] [2023-11-06 23:06:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:13,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:13,596 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:13,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572696191] [2023-11-06 23:06:13,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:13,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:13,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:13,599 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:13,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:06:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:14,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:06:14,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:06:14,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:14,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272985878] [2023-11-06 23:06:14,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572696191] [2023-11-06 23:06:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572696191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:14,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:14,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:06:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091999664] [2023-11-06 23:06:14,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:06:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:14,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:06:14,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:06:14,419 INFO L87 Difference]: Start difference. First operand 13794 states and 21017 transitions. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:16,503 INFO L93 Difference]: Finished difference Result 34818 states and 53059 transitions. [2023-11-06 23:06:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:06:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 586 [2023-11-06 23:06:16,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:16,554 INFO L225 Difference]: With dead ends: 34818 [2023-11-06 23:06:16,554 INFO L226 Difference]: Without dead ends: 21144 [2023-11-06 23:06:16,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 583 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:06:16,576 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 1038 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:16,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 2401 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:06:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21144 states. [2023-11-06 23:06:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21144 to 18350. [2023-11-06 23:06:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18350 states, 15999 states have (on average 1.4925307831739483) internal successors, (23879), 15999 states have internal predecessors, (23879), 2125 states have call successors, (2125), 225 states have call predecessors, (2125), 225 states have return successors, (2125), 2125 states have call predecessors, (2125), 2125 states have call successors, (2125) [2023-11-06 23:06:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18350 states to 18350 states and 28129 transitions. [2023-11-06 23:06:18,335 INFO L78 Accepts]: Start accepts. Automaton has 18350 states and 28129 transitions. Word has length 586 [2023-11-06 23:06:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:18,336 INFO L495 AbstractCegarLoop]: Abstraction has 18350 states and 28129 transitions. [2023-11-06 23:06:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 18350 states and 28129 transitions. [2023-11-06 23:06:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2023-11-06 23:06:18,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:18,351 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:18,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:18,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:18,561 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:18,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash -85692232, now seen corresponding path program 1 times [2023-11-06 23:06:18,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:18,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079534077] [2023-11-06 23:06:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:18,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:18,636 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:18,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391459091] [2023-11-06 23:06:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:18,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:18,638 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:18,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:06:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:19,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 1474 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:06:19,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:06:21,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:21,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:21,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079534077] [2023-11-06 23:06:21,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:21,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391459091] [2023-11-06 23:06:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391459091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:21,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:06:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174243595] [2023-11-06 23:06:21,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:21,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:06:21,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:06:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:06:21,840 INFO L87 Difference]: Start difference. First operand 18350 states and 28129 transitions. Second operand has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 10 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:24,504 INFO L93 Difference]: Finished difference Result 48034 states and 73445 transitions. [2023-11-06 23:06:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:06:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 10 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 586 [2023-11-06 23:06:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:24,661 INFO L225 Difference]: With dead ends: 48034 [2023-11-06 23:06:24,661 INFO L226 Difference]: Without dead ends: 29868 [2023-11-06 23:06:24,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:06:24,673 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 1138 mSDsluCounter, 3130 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 4085 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:24,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 4085 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:06:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29868 states. [2023-11-06 23:06:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29868 to 24904. [2023-11-06 23:06:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24904 states, 21425 states have (on average 1.4825204200700117) internal successors, (31763), 21425 states have internal predecessors, (31763), 3145 states have call successors, (3145), 333 states have call predecessors, (3145), 333 states have return successors, (3145), 3145 states have call predecessors, (3145), 3145 states have call successors, (3145) [2023-11-06 23:06:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24904 states to 24904 states and 38053 transitions. [2023-11-06 23:06:27,257 INFO L78 Accepts]: Start accepts. Automaton has 24904 states and 38053 transitions. Word has length 586 [2023-11-06 23:06:27,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:27,258 INFO L495 AbstractCegarLoop]: Abstraction has 24904 states and 38053 transitions. [2023-11-06 23:06:27,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.909090909090908) internal successors, (164), 10 states have internal predecessors, (164), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:27,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24904 states and 38053 transitions. [2023-11-06 23:06:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-11-06 23:06:27,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:27,276 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:27,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-06 23:06:27,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:27,477 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:27,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash 876743461, now seen corresponding path program 1 times [2023-11-06 23:06:27,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:27,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263417071] [2023-11-06 23:06:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:27,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:27,575 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:27,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725223172] [2023-11-06 23:06:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:27,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:27,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:06:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:28,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:06:28,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:30,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:06:30,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:30,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:30,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263417071] [2023-11-06 23:06:30,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:30,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725223172] [2023-11-06 23:06:30,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725223172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:30,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:30,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 23:06:30,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296344066] [2023-11-06 23:06:30,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:30,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:06:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:06:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:06:30,190 INFO L87 Difference]: Start difference. First operand 24904 states and 38053 transitions. Second operand has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:32,862 INFO L93 Difference]: Finished difference Result 60622 states and 91966 transitions. [2023-11-06 23:06:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:06:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 587 [2023-11-06 23:06:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:32,929 INFO L225 Difference]: With dead ends: 60622 [2023-11-06 23:06:32,930 INFO L226 Difference]: Without dead ends: 35902 [2023-11-06 23:06:32,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:06:32,955 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 402 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 2688 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:32,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 2688 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:06:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35902 states. [2023-11-06 23:06:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35902 to 27246. [2023-11-06 23:06:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27246 states, 23767 states have (on average 1.4929524130096352) internal successors, (35483), 23767 states have internal predecessors, (35483), 3145 states have call successors, (3145), 333 states have call predecessors, (3145), 333 states have return successors, (3145), 3145 states have call predecessors, (3145), 3145 states have call successors, (3145) [2023-11-06 23:06:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27246 states to 27246 states and 41773 transitions. [2023-11-06 23:06:35,681 INFO L78 Accepts]: Start accepts. Automaton has 27246 states and 41773 transitions. Word has length 587 [2023-11-06 23:06:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:35,682 INFO L495 AbstractCegarLoop]: Abstraction has 27246 states and 41773 transitions. [2023-11-06 23:06:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.625) internal successors, (165), 8 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27246 states and 41773 transitions. [2023-11-06 23:06:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-11-06 23:06:35,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:35,694 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:35,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:35,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 23:06:35,895 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:35,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 367270371, now seen corresponding path program 1 times [2023-11-06 23:06:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:35,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687875989] [2023-11-06 23:06:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:35,971 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:35,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708753297] [2023-11-06 23:06:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:35,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:35,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:35,973 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:35,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:06:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:36,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 23:06:36,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:06:39,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:39,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687875989] [2023-11-06 23:06:39,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:39,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708753297] [2023-11-06 23:06:39,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708753297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:39,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:39,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 23:06:39,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418980202] [2023-11-06 23:06:39,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:39,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:06:39,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:06:39,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:06:39,060 INFO L87 Difference]: Start difference. First operand 27246 states and 41773 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 11 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:43,795 INFO L93 Difference]: Finished difference Result 65802 states and 100521 transitions. [2023-11-06 23:06:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:06:43,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 11 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 587 [2023-11-06 23:06:43,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:43,841 INFO L225 Difference]: With dead ends: 65802 [2023-11-06 23:06:43,841 INFO L226 Difference]: Without dead ends: 38740 [2023-11-06 23:06:43,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:06:43,860 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 2012 mSDsluCounter, 3408 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2012 SdHoareTripleChecker+Valid, 4260 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:43,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2012 Valid, 4260 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 23:06:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38740 states. [2023-11-06 23:06:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38740 to 30494. [2023-11-06 23:06:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30494 states, 27015 states have (on average 1.503572089579863) internal successors, (40619), 27015 states have internal predecessors, (40619), 3145 states have call successors, (3145), 333 states have call predecessors, (3145), 333 states have return successors, (3145), 3145 states have call predecessors, (3145), 3145 states have call successors, (3145) [2023-11-06 23:06:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30494 states to 30494 states and 46909 transitions. [2023-11-06 23:06:46,269 INFO L78 Accepts]: Start accepts. Automaton has 30494 states and 46909 transitions. Word has length 587 [2023-11-06 23:06:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:46,270 INFO L495 AbstractCegarLoop]: Abstraction has 30494 states and 46909 transitions. [2023-11-06 23:06:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 11 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30494 states and 46909 transitions. [2023-11-06 23:06:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-11-06 23:06:46,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:46,280 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:46,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:46,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:06:46,481 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:46,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash 811789989, now seen corresponding path program 1 times [2023-11-06 23:06:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:46,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250523591] [2023-11-06 23:06:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:46,562 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:46,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658000485] [2023-11-06 23:06:46,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:46,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:46,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:46,564 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:46,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:06:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:47,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 1477 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:06:47,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:06:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:06:51,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:06:51,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:06:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250523591] [2023-11-06 23:06:51,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:06:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658000485] [2023-11-06 23:06:51,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658000485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:06:51,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:06:51,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:06:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340279667] [2023-11-06 23:06:51,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:06:51,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:06:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:51,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:06:51,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:06:51,267 INFO L87 Difference]: Start difference. First operand 30494 states and 46909 transitions. Second operand has 10 states, 10 states have (on average 16.5) internal successors, (165), 9 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:06:55,507 INFO L93 Difference]: Finished difference Result 63318 states and 97169 transitions. [2023-11-06 23:06:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:06:55,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.5) internal successors, (165), 9 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 587 [2023-11-06 23:06:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:06:55,554 INFO L225 Difference]: With dead ends: 63318 [2023-11-06 23:06:55,554 INFO L226 Difference]: Without dead ends: 33008 [2023-11-06 23:06:55,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:06:55,583 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 1008 mSDsluCounter, 2727 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 3595 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:06:55,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 3595 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:06:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33008 states. [2023-11-06 23:06:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33008 to 29726. [2023-11-06 23:06:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29726 states, 26247 states have (on average 1.500323846534842) internal successors, (39379), 26247 states have internal predecessors, (39379), 3145 states have call successors, (3145), 333 states have call predecessors, (3145), 333 states have return successors, (3145), 3145 states have call predecessors, (3145), 3145 states have call successors, (3145) [2023-11-06 23:06:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29726 states to 29726 states and 45669 transitions. [2023-11-06 23:06:57,936 INFO L78 Accepts]: Start accepts. Automaton has 29726 states and 45669 transitions. Word has length 587 [2023-11-06 23:06:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:06:57,937 INFO L495 AbstractCegarLoop]: Abstraction has 29726 states and 45669 transitions. [2023-11-06 23:06:57,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.5) internal successors, (165), 9 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:06:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 29726 states and 45669 transitions. [2023-11-06 23:06:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2023-11-06 23:06:57,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:06:57,952 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:06:57,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:06:58,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:06:58,154 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:06:58,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:06:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash 302316899, now seen corresponding path program 1 times [2023-11-06 23:06:58,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:06:58,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233400384] [2023-11-06 23:06:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:58,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:06:58,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:06:58,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598785562] [2023-11-06 23:06:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:06:58,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:06:58,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:06:58,294 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:06:58,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:06:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:06:59,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:06:59,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:07:01,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:01,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:01,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233400384] [2023-11-06 23:07:01,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:01,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598785562] [2023-11-06 23:07:01,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598785562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:01,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:01,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:07:01,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259654462] [2023-11-06 23:07:01,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:01,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:07:01,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:01,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:07:01,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:07:01,667 INFO L87 Difference]: Start difference. First operand 29726 states and 45669 transitions. Second operand has 11 states, 11 states have (on average 15.0) internal successors, (165), 10 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:07:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:05,092 INFO L93 Difference]: Finished difference Result 61742 states and 94723 transitions. [2023-11-06 23:07:05,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:07:05,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 10 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 587 [2023-11-06 23:07:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:05,137 INFO L225 Difference]: With dead ends: 61742 [2023-11-06 23:07:05,137 INFO L226 Difference]: Without dead ends: 32200 [2023-11-06 23:07:05,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:07:05,164 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 1100 mSDsluCounter, 4112 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 5088 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:05,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 5088 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:07:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32200 states. [2023-11-06 23:07:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32200 to 28370. [2023-11-06 23:07:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28370 states, 24891 states have (on average 1.4931903097505121) internal successors, (37167), 24891 states have internal predecessors, (37167), 3145 states have call successors, (3145), 333 states have call predecessors, (3145), 333 states have return successors, (3145), 3145 states have call predecessors, (3145), 3145 states have call successors, (3145) [2023-11-06 23:07:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28370 states to 28370 states and 43457 transitions. [2023-11-06 23:07:07,321 INFO L78 Accepts]: Start accepts. Automaton has 28370 states and 43457 transitions. Word has length 587 [2023-11-06 23:07:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:07,322 INFO L495 AbstractCegarLoop]: Abstraction has 28370 states and 43457 transitions. [2023-11-06 23:07:07,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.0) internal successors, (165), 10 states have internal predecessors, (165), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:07:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 28370 states and 43457 transitions. [2023-11-06 23:07:07,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2023-11-06 23:07:07,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:07,330 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:07,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:07,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 23:07:07,531 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:07,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1222084385, now seen corresponding path program 1 times [2023-11-06 23:07:07,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:07,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825905551] [2023-11-06 23:07:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:07,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:07,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:07,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716595886] [2023-11-06 23:07:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:07,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:07,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:07,614 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:07,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:07:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:08,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:07:08,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-06 23:07:08,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:07:08,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825905551] [2023-11-06 23:07:08,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:08,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716595886] [2023-11-06 23:07:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716595886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:07:08,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:07:08,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:07:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442982018] [2023-11-06 23:07:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:07:08,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:07:08,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:08,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:07:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:07:08,608 INFO L87 Difference]: Start difference. First operand 28370 states and 43457 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:07:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:10,386 INFO L93 Difference]: Finished difference Result 53318 states and 82043 transitions. [2023-11-06 23:07:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:07:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 589 [2023-11-06 23:07:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:10,432 INFO L225 Difference]: With dead ends: 53318 [2023-11-06 23:07:10,432 INFO L226 Difference]: Without dead ends: 39224 [2023-11-06 23:07:10,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 587 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 23:07:10,445 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 179 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:10,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 988 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:07:10,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39224 states. [2023-11-06 23:07:13,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39224 to 38178. [2023-11-06 23:07:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38178 states, 34699 states have (on average 1.5145393238998242) internal successors, (52553), 34699 states have internal predecessors, (52553), 3145 states have call successors, (3145), 333 states have call predecessors, (3145), 333 states have return successors, (3145), 3145 states have call predecessors, (3145), 3145 states have call successors, (3145) [2023-11-06 23:07:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38178 states to 38178 states and 58843 transitions. [2023-11-06 23:07:13,275 INFO L78 Accepts]: Start accepts. Automaton has 38178 states and 58843 transitions. Word has length 589 [2023-11-06 23:07:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:13,276 INFO L495 AbstractCegarLoop]: Abstraction has 38178 states and 58843 transitions. [2023-11-06 23:07:13,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-06 23:07:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 38178 states and 58843 transitions. [2023-11-06 23:07:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-11-06 23:07:13,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:13,284 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:13,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:13,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:07:13,485 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:13,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash 217621292, now seen corresponding path program 1 times [2023-11-06 23:07:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294522734] [2023-11-06 23:07:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:13,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:13,569 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:13,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560638536] [2023-11-06 23:07:13,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:13,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:13,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:13,571 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:13,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:07:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:14,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:07:14,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 6718 proven. 159 refuted. 0 times theorem prover too weak. 7403 trivial. 0 not checked. [2023-11-06 23:07:14,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 93 proven. 159 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-06 23:07:15,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294522734] [2023-11-06 23:07:15,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:15,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560638536] [2023-11-06 23:07:15,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560638536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:15,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:15,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:07:15,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712561016] [2023-11-06 23:07:15,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:15,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:07:15,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:07:15,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:07:15,559 INFO L87 Difference]: Start difference. First operand 38178 states and 58843 transitions. Second operand has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 3 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) [2023-11-06 23:07:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:07:17,990 INFO L93 Difference]: Finished difference Result 76616 states and 117829 transitions. [2023-11-06 23:07:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:07:17,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 3 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) Word has length 590 [2023-11-06 23:07:17,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:07:18,036 INFO L225 Difference]: With dead ends: 76616 [2023-11-06 23:07:18,037 INFO L226 Difference]: Without dead ends: 38622 [2023-11-06 23:07:18,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1172 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:07:18,055 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 265 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:07:18,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 1002 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:07:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38622 states. [2023-11-06 23:07:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38622 to 38326. [2023-11-06 23:07:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38326 states, 34810 states have (on average 1.5042803792013788) internal successors, (52364), 34810 states have internal predecessors, (52364), 3145 states have call successors, (3145), 370 states have call predecessors, (3145), 370 states have return successors, (3145), 3145 states have call predecessors, (3145), 3145 states have call successors, (3145) [2023-11-06 23:07:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38326 states to 38326 states and 58654 transitions. [2023-11-06 23:07:20,468 INFO L78 Accepts]: Start accepts. Automaton has 38326 states and 58654 transitions. Word has length 590 [2023-11-06 23:07:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:07:20,469 INFO L495 AbstractCegarLoop]: Abstraction has 38326 states and 58654 transitions. [2023-11-06 23:07:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 3 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 3 states have call predecessors, (139), 3 states have call successors, (139) [2023-11-06 23:07:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 38326 states and 58654 transitions. [2023-11-06 23:07:20,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2023-11-06 23:07:20,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:07:20,479 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:07:20,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 23:07:20,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:07:20,690 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:07:20,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:07:20,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1111107630, now seen corresponding path program 1 times [2023-11-06 23:07:20,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:07:20,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466328716] [2023-11-06 23:07:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:20,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:07:20,764 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:07:20,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661503106] [2023-11-06 23:07:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:07:20,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:07:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:20,766 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:07:20,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_162e1e1a-eefc-4ce1-9367-f1ecffe9de61/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 23:07:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:07:21,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 1483 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:07:21,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:07:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 6999 proven. 318 refuted. 0 times theorem prover too weak. 6963 trivial. 0 not checked. [2023-11-06 23:07:22,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:07:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 180 proven. 321 refuted. 0 times theorem prover too weak. 13779 trivial. 0 not checked. [2023-11-06 23:07:23,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:07:23,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466328716] [2023-11-06 23:07:23,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:07:23,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661503106] [2023-11-06 23:07:23,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661503106] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:07:23,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:07:23,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-06 23:07:23,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351528134] [2023-11-06 23:07:23,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:07:23,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:07:23,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:07:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:07:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:07:23,505 INFO L87 Difference]: Start difference. First operand 38326 states and 58654 transitions. Second operand has 17 states, 16 states have (on average 14.25) internal successors, (228), 16 states have internal predecessors, (228), 6 states have call successors, (140), 3 states have call predecessors, (140), 7 states have return successors, (141), 6 states have call predecessors, (141), 6 states have call successors, (141)