./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.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_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/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_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/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_9a06ec16-1631-4554-82d0-7698b03b55e4/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 a38816720abe2c19fbd70680349ed59f349bca0e0acac641469a31f37cd07bb9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:06:15,132 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:06:15,218 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:06:15,225 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:06:15,226 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:06:15,257 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:06:15,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:06:15,259 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:06:15,260 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:06:15,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:06:15,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:06:15,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:06:15,264 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:06:15,265 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:06:15,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:06:15,266 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:06:15,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:06:15,268 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:06:15,269 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:06:15,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:06:15,270 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:06:15,271 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:06:15,272 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:06:15,273 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:06:15,274 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:06:15,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:06:15,275 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:06:15,276 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:06:15,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:06:15,277 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:06:15,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:06:15,279 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:06:15,279 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:06:15,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:06:15,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:06:15,281 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:06:15,282 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:06:15,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:06:15,283 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:06:15,284 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_9a06ec16-1631-4554-82d0-7698b03b55e4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a38816720abe2c19fbd70680349ed59f349bca0e0acac641469a31f37cd07bb9 [2023-11-06 22:06:15,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:06:15,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:06:15,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:06:15,708 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:06:15,709 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:06:15,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i [2023-11-06 22:06:18,877 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:06:19,220 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:06:19,220 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i [2023-11-06 22:06:19,253 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/data/b27cad491/09cb363a2bf74b2c90690c3a58be04b5/FLAGb6d2dbf49 [2023-11-06 22:06:19,268 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/data/b27cad491/09cb363a2bf74b2c90690c3a58be04b5 [2023-11-06 22:06:19,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:06:19,273 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:06:19,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:19,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:06:19,280 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:06:19,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:19" (1/1) ... [2023-11-06 22:06:19,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a67d5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:19, skipping insertion in model container [2023-11-06 22:06:19,283 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:19" (1/1) ... [2023-11-06 22:06:19,377 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:06:19,529 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_9a06ec16-1631-4554-82d0-7698b03b55e4/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i[916,929] [2023-11-06 22:06:19,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:19,872 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:06:19,882 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_9a06ec16-1631-4554-82d0-7698b03b55e4/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-84.i[916,929] [2023-11-06 22:06:20,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:20,166 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:06:20,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20 WrapperNode [2023-11-06 22:06:20,167 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:20,168 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:20,168 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:06:20,168 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:06:20,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,233 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,475 INFO L138 Inliner]: procedures = 26, calls = 90, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 682 [2023-11-06 22:06:20,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:20,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:06:20,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:06:20,478 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:06:20,490 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,537 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,595 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,635 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:06:20,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:06:20,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:06:20,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:06:20,659 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (1/1) ... [2023-11-06 22:06:20,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:06:20,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:20,692 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:06:20,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:06:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:06:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:06:20,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:06:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:06:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:06:20,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:06:20,922 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:06:20,924 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:06:22,458 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:06:22,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:06:22,476 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:06:22,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:22 BoogieIcfgContainer [2023-11-06 22:06:22,480 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:06:22,486 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:06:22,487 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:06:22,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:06:22,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:06:19" (1/3) ... [2023-11-06 22:06:22,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1077539f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:22, skipping insertion in model container [2023-11-06 22:06:22,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:20" (2/3) ... [2023-11-06 22:06:22,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1077539f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:22, skipping insertion in model container [2023-11-06 22:06:22,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:22" (3/3) ... [2023-11-06 22:06:22,495 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-84.i [2023-11-06 22:06:22,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:06:22,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:06:22,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:06:22,626 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;@4891c83a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:06:22,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:06:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 274 states, 194 states have (on average 1.5876288659793814) internal successors, (308), 195 states have internal predecessors, (308), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-06 22:06:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-06 22:06:22,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:22,675 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:22,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:22,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:22,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1639912538, now seen corresponding path program 1 times [2023-11-06 22:06:22,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:22,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043587828] [2023-11-06 22:06:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:22,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:23,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:23,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043587828] [2023-11-06 22:06:23,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:06:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002093416] [2023-11-06 22:06:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:23,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:23,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:23,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:06:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:23,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:06:23,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2023-11-06 22:06:24,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:24,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002093416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:24,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:24,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:06:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571399915] [2023-11-06 22:06:24,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:24,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:06:24,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:24,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:06:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:06:24,091 INFO L87 Difference]: Start difference. First operand has 274 states, 194 states have (on average 1.5876288659793814) internal successors, (308), 195 states have internal predecessors, (308), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) Second operand has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-06 22:06:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:24,173 INFO L93 Difference]: Finished difference Result 537 states and 987 transitions. [2023-11-06 22:06:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:06:24,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) Word has length 512 [2023-11-06 22:06:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:24,191 INFO L225 Difference]: With dead ends: 537 [2023-11-06 22:06:24,192 INFO L226 Difference]: Without dead ends: 266 [2023-11-06 22:06:24,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 511 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 22:06:24,204 INFO L413 NwaCegarLoop]: 445 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, 445 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 22:06:24,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:06:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-06 22:06:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2023-11-06 22:06:24,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 187 states have (on average 1.5561497326203209) internal successors, (291), 187 states have internal predecessors, (291), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-06 22:06:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 445 transitions. [2023-11-06 22:06:24,306 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 445 transitions. Word has length 512 [2023-11-06 22:06:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:24,307 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 445 transitions. [2023-11-06 22:06:24,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.0) internal successors, (132), 2 states have internal predecessors, (132), 2 states have call successors, (77), 2 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-06 22:06:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 445 transitions. [2023-11-06 22:06:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-06 22:06:24,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:24,328 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:24,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:24,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:06:24,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:24,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:24,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1023296, now seen corresponding path program 1 times [2023-11-06 22:06:24,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:24,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859522961] [2023-11-06 22:06:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:24,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:24,714 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:24,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361950713] [2023-11-06 22:06:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:24,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:24,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:24,717 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:24,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:06:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:25,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:06:25,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-06 22:06:25,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:25,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:25,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859522961] [2023-11-06 22:06:25,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:25,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361950713] [2023-11-06 22:06:25,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361950713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:25,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:25,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066928915] [2023-11-06 22:06:25,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:25,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:25,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:25,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:25,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:25,344 INFO L87 Difference]: Start difference. First operand 266 states and 445 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:25,556 INFO L93 Difference]: Finished difference Result 790 states and 1325 transitions. [2023-11-06 22:06:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 512 [2023-11-06 22:06:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:25,569 INFO L225 Difference]: With dead ends: 790 [2023-11-06 22:06:25,569 INFO L226 Difference]: Without dead ends: 527 [2023-11-06 22:06:25,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 510 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 22:06:25,576 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 430 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:25,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1045 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2023-11-06 22:06:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 324. [2023-11-06 22:06:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 245 states have (on average 1.6040816326530611) internal successors, (393), 245 states have internal predecessors, (393), 77 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2023-11-06 22:06:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 547 transitions. [2023-11-06 22:06:25,671 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 547 transitions. Word has length 512 [2023-11-06 22:06:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:25,675 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 547 transitions. [2023-11-06 22:06:25,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 547 transitions. [2023-11-06 22:06:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-06 22:06:25,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:25,690 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:25,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:25,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 22:06:25,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:25,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:25,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1215130430, now seen corresponding path program 1 times [2023-11-06 22:06:25,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:25,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442219296] [2023-11-06 22:06:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:25,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:26,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:26,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137290292] [2023-11-06 22:06:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:26,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:26,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:26,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:26,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:06:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:26,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:06:26,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-06 22:06:26,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:26,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:26,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442219296] [2023-11-06 22:06:26,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:26,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137290292] [2023-11-06 22:06:26,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137290292] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:26,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:26,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:06:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871374811] [2023-11-06 22:06:26,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:26,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:26,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:26,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:26,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:26,762 INFO L87 Difference]: Start difference. First operand 324 states and 547 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:26,885 INFO L93 Difference]: Finished difference Result 965 states and 1633 transitions. [2023-11-06 22:06:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 512 [2023-11-06 22:06:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:26,894 INFO L225 Difference]: With dead ends: 965 [2023-11-06 22:06:26,895 INFO L226 Difference]: Without dead ends: 644 [2023-11-06 22:06:26,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 510 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 22:06:26,898 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 378 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:26,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1073 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:06:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2023-11-06 22:06:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 642. [2023-11-06 22:06:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 485 states have (on average 1.597938144329897) internal successors, (775), 485 states have internal predecessors, (775), 154 states have call successors, (154), 2 states have call predecessors, (154), 2 states have return successors, (154), 154 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-06 22:06:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1083 transitions. [2023-11-06 22:06:26,968 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1083 transitions. Word has length 512 [2023-11-06 22:06:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:26,970 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 1083 transitions. [2023-11-06 22:06:26,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1083 transitions. [2023-11-06 22:06:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-06 22:06:26,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:26,977 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:26,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:27,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:27,187 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:27,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1433985148, now seen corresponding path program 1 times [2023-11-06 22:06:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:27,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423801305] [2023-11-06 22:06:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:27,345 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:27,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276467582] [2023-11-06 22:06:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:27,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:27,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:27,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:06:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:27,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:06:27,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 3378 proven. 189 refuted. 0 times theorem prover too weak. 8137 trivial. 0 not checked. [2023-11-06 22:06:30,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 39 proven. 189 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:06:30,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423801305] [2023-11-06 22:06:30,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276467582] [2023-11-06 22:06:30,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276467582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:30,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:30,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:06:30,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738201256] [2023-11-06 22:06:30,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:30,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:06:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:30,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:06:30,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:06:30,769 INFO L87 Difference]: Start difference. First operand 642 states and 1083 transitions. Second operand has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-06 22:06:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:33,255 INFO L93 Difference]: Finished difference Result 2324 states and 3931 transitions. [2023-11-06 22:06:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:06:33,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 512 [2023-11-06 22:06:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:33,273 INFO L225 Difference]: With dead ends: 2324 [2023-11-06 22:06:33,273 INFO L226 Difference]: Without dead ends: 1685 [2023-11-06 22:06:33,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 1012 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:06:33,281 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 2301 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2377 SdHoareTripleChecker+Valid, 3034 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:33,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2377 Valid, 3034 Invalid, 2026 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [348 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:06:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2023-11-06 22:06:33,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1295. [2023-11-06 22:06:33,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 980 states have (on average 1.5928571428571427) internal successors, (1561), 980 states have internal predecessors, (1561), 308 states have call successors, (308), 6 states have call predecessors, (308), 6 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 22:06:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2177 transitions. [2023-11-06 22:06:33,570 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2177 transitions. Word has length 512 [2023-11-06 22:06:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:33,571 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 2177 transitions. [2023-11-06 22:06:33,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.428571428571429) internal successors, (202), 14 states have internal predecessors, (202), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-06 22:06:33,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2177 transitions. [2023-11-06 22:06:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-06 22:06:33,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:33,577 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:33,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:33,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:33,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:33,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:33,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1907041990, now seen corresponding path program 1 times [2023-11-06 22:06:33,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:33,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297785748] [2023-11-06 22:06:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:33,877 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:33,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391228899] [2023-11-06 22:06:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:33,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:33,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:33,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:33,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:06:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:34,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:06:34,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 2848 proven. 30 refuted. 0 times theorem prover too weak. 8826 trivial. 0 not checked. [2023-11-06 22:06:34,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 198 proven. 30 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:06:34,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:34,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297785748] [2023-11-06 22:06:34,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:34,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391228899] [2023-11-06 22:06:34,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391228899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:34,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:34,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:06:34,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891798077] [2023-11-06 22:06:34,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:06:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:06:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:06:34,945 INFO L87 Difference]: Start difference. First operand 1295 states and 2177 transitions. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-06 22:06:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:35,657 INFO L93 Difference]: Finished difference Result 2486 states and 4169 transitions. [2023-11-06 22:06:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:06:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 512 [2023-11-06 22:06:35,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:35,674 INFO L225 Difference]: With dead ends: 2486 [2023-11-06 22:06:35,674 INFO L226 Difference]: Without dead ends: 1327 [2023-11-06 22:06:35,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 1016 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 22:06:35,679 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 592 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:35,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 903 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:06:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2023-11-06 22:06:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1311. [2023-11-06 22:06:35,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1311 states, 992 states have (on average 1.5534274193548387) internal successors, (1541), 992 states have internal predecessors, (1541), 308 states have call successors, (308), 10 states have call predecessors, (308), 10 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 22:06:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1311 states to 1311 states and 2157 transitions. [2023-11-06 22:06:35,892 INFO L78 Accepts]: Start accepts. Automaton has 1311 states and 2157 transitions. Word has length 512 [2023-11-06 22:06:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:35,894 INFO L495 AbstractCegarLoop]: Abstraction has 1311 states and 2157 transitions. [2023-11-06 22:06:35,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-06 22:06:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1311 states and 2157 transitions. [2023-11-06 22:06:35,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-06 22:06:35,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:35,923 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:35,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:06:36,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:36,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:36,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1402667658, now seen corresponding path program 1 times [2023-11-06 22:06:36,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:36,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742708157] [2023-11-06 22:06:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:36,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:36,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158018806] [2023-11-06 22:06:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:36,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:36,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:36,213 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:36,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:06:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:36,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:06:36,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-06 22:06:36,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:36,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:36,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742708157] [2023-11-06 22:06:36,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:36,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158018806] [2023-11-06 22:06:36,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158018806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:36,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:36,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:06:36,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464546173] [2023-11-06 22:06:36,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:36,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:06:36,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:36,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:06:36,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:06:36,789 INFO L87 Difference]: Start difference. First operand 1311 states and 2157 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:37,387 INFO L93 Difference]: Finished difference Result 3673 states and 6044 transitions. [2023-11-06 22:06:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:06:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 512 [2023-11-06 22:06:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:37,409 INFO L225 Difference]: With dead ends: 3673 [2023-11-06 22:06:37,409 INFO L226 Difference]: Without dead ends: 2502 [2023-11-06 22:06:37,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 510 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 22:06:37,435 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 745 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:37,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 1059 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:06:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2023-11-06 22:06:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 1831. [2023-11-06 22:06:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1831 states, 1508 states have (on average 1.6167108753315649) internal successors, (2438), 1508 states have internal predecessors, (2438), 308 states have call successors, (308), 14 states have call predecessors, (308), 14 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 22:06:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1831 states to 1831 states and 3054 transitions. [2023-11-06 22:06:37,683 INFO L78 Accepts]: Start accepts. Automaton has 1831 states and 3054 transitions. Word has length 512 [2023-11-06 22:06:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:37,684 INFO L495 AbstractCegarLoop]: Abstraction has 1831 states and 3054 transitions. [2023-11-06 22:06:37,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1831 states and 3054 transitions. [2023-11-06 22:06:37,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2023-11-06 22:06:37,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:37,691 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:37,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:37,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:06:37,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:37,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash -968938572, now seen corresponding path program 1 times [2023-11-06 22:06:37,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:37,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977040451] [2023-11-06 22:06:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:38,011 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:38,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636590036] [2023-11-06 22:06:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:38,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:38,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:38,020 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:38,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:06:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:38,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:06:38,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 3276 proven. 36 refuted. 0 times theorem prover too weak. 8392 trivial. 0 not checked. [2023-11-06 22:06:38,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 192 proven. 36 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:06:39,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:39,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977040451] [2023-11-06 22:06:39,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:39,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636590036] [2023-11-06 22:06:39,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636590036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:39,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:39,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 22:06:39,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036144582] [2023-11-06 22:06:39,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:39,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:06:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:06:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:06:39,102 INFO L87 Difference]: Start difference. First operand 1831 states and 3054 transitions. Second operand has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-06 22:06:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:39,950 INFO L93 Difference]: Finished difference Result 3070 states and 5043 transitions. [2023-11-06 22:06:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:06:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 512 [2023-11-06 22:06:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:39,963 INFO L225 Difference]: With dead ends: 3070 [2023-11-06 22:06:39,963 INFO L226 Difference]: Without dead ends: 1383 [2023-11-06 22:06:39,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1030 GetRequests, 1015 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:06:39,968 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 545 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:39,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 889 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:06:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2023-11-06 22:06:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1343. [2023-11-06 22:06:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1016 states have (on average 1.5196850393700787) internal successors, (1544), 1016 states have internal predecessors, (1544), 308 states have call successors, (308), 18 states have call predecessors, (308), 18 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 22:06:40,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2160 transitions. [2023-11-06 22:06:40,230 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2160 transitions. Word has length 512 [2023-11-06 22:06:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:40,232 INFO L495 AbstractCegarLoop]: Abstraction has 1343 states and 2160 transitions. [2023-11-06 22:06:40,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 2 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2023-11-06 22:06:40,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2160 transitions. [2023-11-06 22:06:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-06 22:06:40,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:40,241 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:40,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:40,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:40,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:40,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1766757612, now seen corresponding path program 1 times [2023-11-06 22:06:40,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:40,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528564391] [2023-11-06 22:06:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:40,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:40,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:40,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674487812] [2023-11-06 22:06:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:40,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:40,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:40,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:40,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:06:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:41,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:06:41,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 2388 proven. 24 refuted. 0 times theorem prover too weak. 9292 trivial. 0 not checked. [2023-11-06 22:06:41,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 204 proven. 24 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:06:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528564391] [2023-11-06 22:06:41,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:41,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674487812] [2023-11-06 22:06:41,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674487812] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:41,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:41,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:06:41,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603440337] [2023-11-06 22:06:41,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:06:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:41,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:06:41,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:06:41,524 INFO L87 Difference]: Start difference. First operand 1343 states and 2160 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-06 22:06:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:42,414 INFO L93 Difference]: Finished difference Result 2570 states and 4114 transitions. [2023-11-06 22:06:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:06:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 513 [2023-11-06 22:06:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:42,426 INFO L225 Difference]: With dead ends: 2570 [2023-11-06 22:06:42,426 INFO L226 Difference]: Without dead ends: 1375 [2023-11-06 22:06:42,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1018 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 22:06:42,431 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 816 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:42,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 880 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:06:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2023-11-06 22:06:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1275. [2023-11-06 22:06:42,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 944 states have (on average 1.4618644067796611) internal successors, (1380), 944 states have internal predecessors, (1380), 308 states have call successors, (308), 22 states have call predecessors, (308), 22 states have return successors, (308), 308 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 22:06:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1996 transitions. [2023-11-06 22:06:42,640 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1996 transitions. Word has length 513 [2023-11-06 22:06:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:42,641 INFO L495 AbstractCegarLoop]: Abstraction has 1275 states and 1996 transitions. [2023-11-06 22:06:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2023-11-06 22:06:42,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1996 transitions. [2023-11-06 22:06:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-06 22:06:42,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:42,647 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:42,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:42,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:06:42,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:42,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1206057834, now seen corresponding path program 1 times [2023-11-06 22:06:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:42,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305528040] [2023-11-06 22:06:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:42,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:42,976 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:42,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721048687] [2023-11-06 22:06:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:42,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:42,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:42,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:42,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:06:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:43,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:06:43,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5545 proven. 348 refuted. 0 times theorem prover too weak. 5811 trivial. 0 not checked. [2023-11-06 22:06:45,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 102 proven. 351 refuted. 0 times theorem prover too weak. 11251 trivial. 0 not checked. [2023-11-06 22:06:45,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305528040] [2023-11-06 22:06:45,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:45,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721048687] [2023-11-06 22:06:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721048687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:45,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:45,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 22:06:45,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227369724] [2023-11-06 22:06:45,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:06:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:06:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:06:45,980 INFO L87 Difference]: Start difference. First operand 1275 states and 1996 transitions. Second operand has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 5 states have call successors, (142), 3 states have call predecessors, (142), 7 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-06 22:06:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:48,155 INFO L93 Difference]: Finished difference Result 3632 states and 5666 transitions. [2023-11-06 22:06:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:06:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 5 states have call successors, (142), 3 states have call predecessors, (142), 7 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) Word has length 513 [2023-11-06 22:06:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:48,205 INFO L225 Difference]: With dead ends: 3632 [2023-11-06 22:06:48,205 INFO L226 Difference]: Without dead ends: 2509 [2023-11-06 22:06:48,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 1014 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=1226, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:06:48,211 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 1001 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:48,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 1273 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:06:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2023-11-06 22:06:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 2427. [2023-11-06 22:06:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 1933 states have (on average 1.5080186239006725) internal successors, (2915), 1939 states have internal predecessors, (2915), 446 states have call successors, (446), 47 states have call predecessors, (446), 47 states have return successors, (446), 440 states have call predecessors, (446), 446 states have call successors, (446) [2023-11-06 22:06:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3807 transitions. [2023-11-06 22:06:48,585 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3807 transitions. Word has length 513 [2023-11-06 22:06:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:48,586 INFO L495 AbstractCegarLoop]: Abstraction has 2427 states and 3807 transitions. [2023-11-06 22:06:48,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 5 states have call successors, (142), 3 states have call predecessors, (142), 7 states have return successors, (143), 5 states have call predecessors, (143), 5 states have call successors, (143) [2023-11-06 22:06:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3807 transitions. [2023-11-06 22:06:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-06 22:06:48,594 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:48,595 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:48,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 22:06:48,804 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:48,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1060323352, now seen corresponding path program 1 times [2023-11-06 22:06:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:48,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086200392] [2023-11-06 22:06:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:48,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:48,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782584146] [2023-11-06 22:06:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:48,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:48,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:48,886 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:48,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:06:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:49,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:06:49,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5922 proven. 117 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2023-11-06 22:06:49,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 111 proven. 117 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:06:50,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:50,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086200392] [2023-11-06 22:06:50,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:50,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782584146] [2023-11-06 22:06:50,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782584146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:06:50,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:06:50,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-06 22:06:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626243427] [2023-11-06 22:06:50,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:06:50,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:06:50,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:06:50,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:06:50,395 INFO L87 Difference]: Start difference. First operand 2427 states and 3807 transitions. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-06 22:06:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:51,662 INFO L93 Difference]: Finished difference Result 4288 states and 6777 transitions. [2023-11-06 22:06:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:06:51,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) Word has length 513 [2023-11-06 22:06:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:51,679 INFO L225 Difference]: With dead ends: 4288 [2023-11-06 22:06:51,679 INFO L226 Difference]: Without dead ends: 2021 [2023-11-06 22:06:51,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1017 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:06:51,687 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 1784 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 541 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:51,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1822 Valid, 1107 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:06:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2023-11-06 22:06:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1980. [2023-11-06 22:06:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1665 states have (on average 1.5405405405405406) internal successors, (2565), 1670 states have internal predecessors, (2565), 283 states have call successors, (283), 31 states have call predecessors, (283), 31 states have return successors, (283), 278 states have call predecessors, (283), 283 states have call successors, (283) [2023-11-06 22:06:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3131 transitions. [2023-11-06 22:06:51,953 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3131 transitions. Word has length 513 [2023-11-06 22:06:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:51,954 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 3131 transitions. [2023-11-06 22:06:51,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 2 states have call successors, (116), 2 states have call predecessors, (116), 4 states have return successors, (117), 2 states have call predecessors, (117), 2 states have call successors, (117) [2023-11-06 22:06:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3131 transitions. [2023-11-06 22:06:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2023-11-06 22:06:51,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:51,961 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:51,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:06:52,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:52,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1935192746, now seen corresponding path program 1 times [2023-11-06 22:06:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506460477] [2023-11-06 22:06:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:52,255 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:52,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102874439] [2023-11-06 22:06:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:52,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:52,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:52,257 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:52,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:06:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:52,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:06:52,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-06 22:06:52,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:06:52,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:52,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506460477] [2023-11-06 22:06:52,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:52,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102874439] [2023-11-06 22:06:52,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102874439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:52,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:52,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:06:52,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391118027] [2023-11-06 22:06:52,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:52,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:06:52,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:06:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:06:52,889 INFO L87 Difference]: Start difference. First operand 1980 states and 3131 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:53,976 INFO L93 Difference]: Finished difference Result 3936 states and 6185 transitions. [2023-11-06 22:06:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:06:53,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 513 [2023-11-06 22:06:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:53,997 INFO L225 Difference]: With dead ends: 3936 [2023-11-06 22:06:53,997 INFO L226 Difference]: Without dead ends: 2504 [2023-11-06 22:06:54,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:06:54,001 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 2077 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:54,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2077 Valid, 1242 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:06:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2023-11-06 22:06:54,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 989. [2023-11-06 22:06:54,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 764 states have (on average 1.4829842931937174) internal successors, (1133), 766 states have internal predecessors, (1133), 200 states have call successors, (200), 24 states have call predecessors, (200), 24 states have return successors, (200), 198 states have call predecessors, (200), 200 states have call successors, (200) [2023-11-06 22:06:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1533 transitions. [2023-11-06 22:06:54,176 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1533 transitions. Word has length 513 [2023-11-06 22:06:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:54,178 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1533 transitions. [2023-11-06 22:06:54,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:06:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1533 transitions. [2023-11-06 22:06:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2023-11-06 22:06:54,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:54,184 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:54,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:54,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:54,394 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:54,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash 805929269, now seen corresponding path program 1 times [2023-11-06 22:06:54,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:54,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585405332] [2023-11-06 22:06:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:54,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:54,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921984472] [2023-11-06 22:06:54,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:54,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:54,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:54,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:54,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:06:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:55,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:06:55,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:06:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5922 proven. 117 refuted. 0 times theorem prover too weak. 5665 trivial. 0 not checked. [2023-11-06 22:06:56,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:06:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-06 22:06:57,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:57,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585405332] [2023-11-06 22:06:57,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:06:57,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921984472] [2023-11-06 22:06:57,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921984472] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:06:57,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:06:57,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2023-11-06 22:06:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398669613] [2023-11-06 22:06:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:57,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:06:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:06:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:06:57,139 INFO L87 Difference]: Start difference. First operand 989 states and 1533 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 2 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-06 22:06:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:58,077 INFO L93 Difference]: Finished difference Result 2506 states and 3936 transitions. [2023-11-06 22:06:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:06:58,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 2 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) Word has length 514 [2023-11-06 22:06:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:58,099 INFO L225 Difference]: With dead ends: 2506 [2023-11-06 22:06:58,099 INFO L226 Difference]: Without dead ends: 1691 [2023-11-06 22:06:58,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 1015 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:06:58,103 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 1418 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:58,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 2059 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:06:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2023-11-06 22:06:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1229. [2023-11-06 22:06:58,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 917 states have (on average 1.455834242093784) internal successors, (1335), 919 states have internal predecessors, (1335), 277 states have call successors, (277), 34 states have call predecessors, (277), 34 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2023-11-06 22:06:58,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1889 transitions. [2023-11-06 22:06:58,343 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1889 transitions. Word has length 514 [2023-11-06 22:06:58,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:58,344 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1889 transitions. [2023-11-06 22:06:58,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 2 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 2 states have call predecessors, (77), 2 states have call successors, (77) [2023-11-06 22:06:58,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1889 transitions. [2023-11-06 22:06:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2023-11-06 22:06:58,349 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:58,349 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:06:58,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:06:58,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:58,558 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:58,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash -658523742, now seen corresponding path program 1 times [2023-11-06 22:06:58,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:58,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444724513] [2023-11-06 22:06:58,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:58,642 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:06:58,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293969418] [2023-11-06 22:06:58,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:58,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:06:58,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:58,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:06:58,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:06:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:59,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:06:59,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5449 proven. 147 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2023-11-06 22:07:01,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 81 proven. 147 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:07:02,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444724513] [2023-11-06 22:07:02,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:07:02,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293969418] [2023-11-06 22:07:02,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293969418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:02,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:07:02,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 22:07:02,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305076972] [2023-11-06 22:07:02,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:02,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:07:02,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:07:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:07:02,607 INFO L87 Difference]: Start difference. First operand 1229 states and 1889 transitions. Second operand has 16 states, 15 states have (on average 16.066666666666666) internal successors, (241), 16 states have internal predecessors, (241), 6 states have call successors, (154), 4 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 6 states have call successors, (154) [2023-11-06 22:07:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:03,731 INFO L93 Difference]: Finished difference Result 2262 states and 3467 transitions. [2023-11-06 22:07:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:07:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 16.066666666666666) internal successors, (241), 16 states have internal predecessors, (241), 6 states have call successors, (154), 4 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 6 states have call successors, (154) Word has length 516 [2023-11-06 22:07:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:03,742 INFO L225 Difference]: With dead ends: 2262 [2023-11-06 22:07:03,742 INFO L226 Difference]: Without dead ends: 1283 [2023-11-06 22:07:03,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 1018 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:07:03,746 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 901 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:03,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 809 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:07:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2023-11-06 22:07:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1241. [2023-11-06 22:07:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 926 states have (on average 1.42548596112311) internal successors, (1320), 928 states have internal predecessors, (1320), 277 states have call successors, (277), 37 states have call predecessors, (277), 37 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2023-11-06 22:07:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1874 transitions. [2023-11-06 22:07:03,937 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1874 transitions. Word has length 516 [2023-11-06 22:07:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:03,938 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 1874 transitions. [2023-11-06 22:07:03,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 16.066666666666666) internal successors, (241), 16 states have internal predecessors, (241), 6 states have call successors, (154), 4 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 6 states have call successors, (154) [2023-11-06 22:07:03,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1874 transitions. [2023-11-06 22:07:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2023-11-06 22:07:03,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:03,944 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:07:03,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:04,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:04,154 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:04,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1614795453, now seen corresponding path program 1 times [2023-11-06 22:07:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:04,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108184363] [2023-11-06 22:07:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:04,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:07:04,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493787998] [2023-11-06 22:07:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:04,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:04,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:04,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:04,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:07:04,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:04,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:07:04,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 3378 proven. 189 refuted. 0 times theorem prover too weak. 8137 trivial. 0 not checked. [2023-11-06 22:07:06,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 39 proven. 189 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:07:07,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:07,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108184363] [2023-11-06 22:07:07,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:07:07,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493787998] [2023-11-06 22:07:07,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493787998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:07,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:07:07,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:07:07,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418697682] [2023-11-06 22:07:07,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:07,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:07:07,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:07:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:07:07,961 INFO L87 Difference]: Start difference. First operand 1241 states and 1874 transitions. Second operand has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-06 22:07:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:11,071 INFO L93 Difference]: Finished difference Result 3648 states and 5565 transitions. [2023-11-06 22:07:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:07:11,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 517 [2023-11-06 22:07:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:11,124 INFO L225 Difference]: With dead ends: 3648 [2023-11-06 22:07:11,125 INFO L226 Difference]: Without dead ends: 2709 [2023-11-06 22:07:11,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1045 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:07:11,131 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 1641 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:11,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1717 Valid, 3068 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1903 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:07:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2023-11-06 22:07:11,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 2242. [2023-11-06 22:07:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1777 states have (on average 1.4710185706246484) internal successors, (2614), 1783 states have internal predecessors, (2614), 406 states have call successors, (406), 58 states have call predecessors, (406), 58 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-06 22:07:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3426 transitions. [2023-11-06 22:07:11,502 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3426 transitions. Word has length 517 [2023-11-06 22:07:11,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:11,504 INFO L495 AbstractCegarLoop]: Abstraction has 2242 states and 3426 transitions. [2023-11-06 22:07:11,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-06 22:07:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3426 transitions. [2023-11-06 22:07:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2023-11-06 22:07:11,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:11,510 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:07:11,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-06 22:07:11,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:11,720 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:11,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:11,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1141831813, now seen corresponding path program 1 times [2023-11-06 22:07:11,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:11,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004616481] [2023-11-06 22:07:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:11,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:11,809 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:07:11,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681293532] [2023-11-06 22:07:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:11,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:11,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:11,812 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:11,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:07:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:12,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:07:12,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-06 22:07:13,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:07:13,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004616481] [2023-11-06 22:07:13,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:07:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681293532] [2023-11-06 22:07:13,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681293532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:13,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:13,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:07:13,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592835325] [2023-11-06 22:07:13,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:13,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:07:13,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:13,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:07:13,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:07:13,958 INFO L87 Difference]: Start difference. First operand 2242 states and 3426 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:07:15,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:15,028 INFO L93 Difference]: Finished difference Result 3671 states and 5594 transitions. [2023-11-06 22:07:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:07:15,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 517 [2023-11-06 22:07:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:15,039 INFO L225 Difference]: With dead ends: 3671 [2023-11-06 22:07:15,039 INFO L226 Difference]: Without dead ends: 2225 [2023-11-06 22:07:15,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:07:15,043 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 662 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:15,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1445 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:07:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2023-11-06 22:07:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2107. [2023-11-06 22:07:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1642 states have (on average 1.4531059683313032) internal successors, (2386), 1648 states have internal predecessors, (2386), 406 states have call successors, (406), 58 states have call predecessors, (406), 58 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-06 22:07:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 3198 transitions. [2023-11-06 22:07:15,441 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 3198 transitions. Word has length 517 [2023-11-06 22:07:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:15,442 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 3198 transitions. [2023-11-06 22:07:15,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:07:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 3198 transitions. [2023-11-06 22:07:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-06 22:07:15,447 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:15,448 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:07:15,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:15,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:07:15,657 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:15,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash 614366325, now seen corresponding path program 1 times [2023-11-06 22:07:15,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:15,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066328399] [2023-11-06 22:07:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:15,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:07:15,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623329463] [2023-11-06 22:07:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:15,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:15,730 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:15,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:07:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:16,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:07:16,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11704 trivial. 0 not checked. [2023-11-06 22:07:17,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:07:17,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:17,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066328399] [2023-11-06 22:07:17,140 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:07:17,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623329463] [2023-11-06 22:07:17,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623329463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:17,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:07:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034050601] [2023-11-06 22:07:17,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:17,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:17,144 INFO L87 Difference]: Start difference. First operand 2107 states and 3198 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:07:17,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:17,595 INFO L93 Difference]: Finished difference Result 4025 states and 6131 transitions. [2023-11-06 22:07:17,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:17,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) Word has length 518 [2023-11-06 22:07:17,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:17,605 INFO L225 Difference]: With dead ends: 4025 [2023-11-06 22:07:17,606 INFO L226 Difference]: Without dead ends: 2107 [2023-11-06 22:07:17,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 516 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 22:07:17,611 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 160 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:17,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 418 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:07:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2023-11-06 22:07:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2107. [2023-11-06 22:07:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 1642 states have (on average 1.4451887941534713) internal successors, (2373), 1648 states have internal predecessors, (2373), 406 states have call successors, (406), 58 states have call predecessors, (406), 58 states have return successors, (406), 400 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-06 22:07:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 3185 transitions. [2023-11-06 22:07:18,018 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 3185 transitions. Word has length 518 [2023-11-06 22:07:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:18,020 INFO L495 AbstractCegarLoop]: Abstraction has 2107 states and 3185 transitions. [2023-11-06 22:07:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 1 states have call successors, (77), 1 states have call predecessors, (77), 1 states have return successors, (77), 1 states have call predecessors, (77), 1 states have call successors, (77) [2023-11-06 22:07:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 3185 transitions. [2023-11-06 22:07:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-06 22:07:18,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:18,025 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:07:18,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:18,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:07:18,235 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:18,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2000569719, now seen corresponding path program 1 times [2023-11-06 22:07:18,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:18,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574890515] [2023-11-06 22:07:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:18,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:07:18,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688388910] [2023-11-06 22:07:18,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:18,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:18,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:18,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:18,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:07:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:19,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:07:19,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 2646 proven. 585 refuted. 0 times theorem prover too weak. 8473 trivial. 0 not checked. [2023-11-06 22:07:21,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:22,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574890515] [2023-11-06 22:07:22,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:07:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688388910] [2023-11-06 22:07:22,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688388910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:22,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:07:22,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-06 22:07:22,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734126160] [2023-11-06 22:07:22,703 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:22,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:07:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:07:22,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:07:22,706 INFO L87 Difference]: Start difference. First operand 2107 states and 3185 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 14 states have internal predecessors, (148), 4 states have call successors, (77), 4 states have call predecessors, (77), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-06 22:07:26,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:26,398 INFO L93 Difference]: Finished difference Result 5636 states and 8466 transitions. [2023-11-06 22:07:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:07:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 14 states have internal predecessors, (148), 4 states have call successors, (77), 4 states have call predecessors, (77), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) Word has length 518 [2023-11-06 22:07:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:26,412 INFO L225 Difference]: With dead ends: 5636 [2023-11-06 22:07:26,412 INFO L226 Difference]: Without dead ends: 3718 [2023-11-06 22:07:26,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 587 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:07:26,418 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 924 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:26,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 1943 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 22:07:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2023-11-06 22:07:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 3276. [2023-11-06 22:07:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3276 states, 2731 states have (on average 1.4738191138777004) internal successors, (4025), 2743 states have internal predecessors, (4025), 460 states have call successors, (460), 84 states have call predecessors, (460), 84 states have return successors, (460), 448 states have call predecessors, (460), 460 states have call successors, (460) [2023-11-06 22:07:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3276 states to 3276 states and 4945 transitions. [2023-11-06 22:07:27,008 INFO L78 Accepts]: Start accepts. Automaton has 3276 states and 4945 transitions. Word has length 518 [2023-11-06 22:07:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:27,012 INFO L495 AbstractCegarLoop]: Abstraction has 3276 states and 4945 transitions. [2023-11-06 22:07:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 14 states have internal predecessors, (148), 4 states have call successors, (77), 4 states have call predecessors, (77), 5 states have return successors, (77), 4 states have call predecessors, (77), 4 states have call successors, (77) [2023-11-06 22:07:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3276 states and 4945 transitions. [2023-11-06 22:07:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-06 22:07:27,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:27,016 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:07:27,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:27,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:07:27,217 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:27,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1418378571, now seen corresponding path program 1 times [2023-11-06 22:07:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:27,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935097074] [2023-11-06 22:07:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:27,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:07:27,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601271393] [2023-11-06 22:07:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:27,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:27,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:27,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:07:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:28,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:07:28,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5902 proven. 348 refuted. 0 times theorem prover too weak. 5454 trivial. 0 not checked. [2023-11-06 22:07:29,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 81 proven. 147 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:07:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:29,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935097074] [2023-11-06 22:07:29,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:07:29,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601271393] [2023-11-06 22:07:29,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601271393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:29,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:07:29,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-06 22:07:29,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668648411] [2023-11-06 22:07:29,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:29,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:07:29,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:07:29,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:07:29,951 INFO L87 Difference]: Start difference. First operand 3276 states and 4945 transitions. Second operand has 15 states, 15 states have (on average 15.866666666666667) internal successors, (238), 15 states have internal predecessors, (238), 4 states have call successors, (145), 3 states have call predecessors, (145), 6 states have return successors, (146), 4 states have call predecessors, (146), 4 states have call successors, (146) [2023-11-06 22:07:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:32,259 INFO L93 Difference]: Finished difference Result 8975 states and 13482 transitions. [2023-11-06 22:07:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:07:32,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 15.866666666666667) internal successors, (238), 15 states have internal predecessors, (238), 4 states have call successors, (145), 3 states have call predecessors, (145), 6 states have return successors, (146), 4 states have call predecessors, (146), 4 states have call successors, (146) Word has length 518 [2023-11-06 22:07:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:32,274 INFO L225 Difference]: With dead ends: 8975 [2023-11-06 22:07:32,274 INFO L226 Difference]: Without dead ends: 5898 [2023-11-06 22:07:32,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 1022 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:07:32,282 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 549 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:32,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1822 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:07:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5898 states. [2023-11-06 22:07:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5898 to 4863. [2023-11-06 22:07:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4863 states, 4118 states have (on average 1.4774162214667315) internal successors, (6084), 4139 states have internal predecessors, (6084), 601 states have call successors, (601), 143 states have call predecessors, (601), 143 states have return successors, (601), 580 states have call predecessors, (601), 601 states have call successors, (601) [2023-11-06 22:07:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 7286 transitions. [2023-11-06 22:07:33,101 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 7286 transitions. Word has length 518 [2023-11-06 22:07:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:33,102 INFO L495 AbstractCegarLoop]: Abstraction has 4863 states and 7286 transitions. [2023-11-06 22:07:33,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.866666666666667) internal successors, (238), 15 states have internal predecessors, (238), 4 states have call successors, (145), 3 states have call predecessors, (145), 6 states have return successors, (146), 4 states have call predecessors, (146), 4 states have call successors, (146) [2023-11-06 22:07:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 7286 transitions. [2023-11-06 22:07:33,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-06 22:07:33,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:33,108 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:07:33,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:07:33,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:07:33,320 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:33,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:33,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1812745357, now seen corresponding path program 1 times [2023-11-06 22:07:33,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:33,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139697204] [2023-11-06 22:07:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:33,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:07:33,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690919127] [2023-11-06 22:07:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:33,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:33,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:33,405 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:33,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:07:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:34,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:07:34,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5394 proven. 1194 refuted. 0 times theorem prover too weak. 5116 trivial. 0 not checked. [2023-11-06 22:07:45,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 231 proven. 663 refuted. 0 times theorem prover too weak. 10810 trivial. 0 not checked. [2023-11-06 22:08:05,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139697204] [2023-11-06 22:08:05,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:05,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690919127] [2023-11-06 22:08:05,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690919127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:05,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:05,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 51 [2023-11-06 22:08:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541908890] [2023-11-06 22:08:05,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:05,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 22:08:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:05,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 22:08:05,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1933, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:08:05,882 INFO L87 Difference]: Start difference. First operand 4863 states and 7286 transitions. Second operand has 51 states, 48 states have (on average 5.895833333333333) internal successors, (283), 47 states have internal predecessors, (283), 15 states have call successors, (154), 9 states have call predecessors, (154), 17 states have return successors, (154), 14 states have call predecessors, (154), 15 states have call successors, (154) [2023-11-06 22:09:01,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-06 22:09:07,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:07,500 INFO L93 Difference]: Finished difference Result 58555 states and 90141 transitions. [2023-11-06 22:09:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2023-11-06 22:09:07,501 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 5.895833333333333) internal successors, (283), 47 states have internal predecessors, (283), 15 states have call successors, (154), 9 states have call predecessors, (154), 17 states have return successors, (154), 14 states have call predecessors, (154), 15 states have call successors, (154) Word has length 518 [2023-11-06 22:09:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:07,647 INFO L225 Difference]: With dead ends: 58555 [2023-11-06 22:09:07,647 INFO L226 Difference]: Without dead ends: 53899 [2023-11-06 22:09:07,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1261 GetRequests, 1022 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24598 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=12707, Invalid=45133, Unknown=0, NotChecked=0, Total=57840 [2023-11-06 22:09:07,685 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 10845 mSDsluCounter, 6270 mSDsCounter, 0 mSdLazyCounter, 8798 mSolverCounterSat, 3548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10852 SdHoareTripleChecker+Valid, 6714 SdHoareTripleChecker+Invalid, 12346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3548 IncrementalHoareTripleChecker+Valid, 8798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:07,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10852 Valid, 6714 Invalid, 12346 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3548 Valid, 8798 Invalid, 0 Unknown, 0 Unchecked, 26.2s Time] [2023-11-06 22:09:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53899 states. [2023-11-06 22:09:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53899 to 14818. [2023-11-06 22:09:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14818 states, 13340 states have (on average 1.5182908545727136) internal successors, (20254), 13367 states have internal predecessors, (20254), 1177 states have call successors, (1177), 300 states have call predecessors, (1177), 300 states have return successors, (1177), 1150 states have call predecessors, (1177), 1177 states have call successors, (1177) [2023-11-06 22:09:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14818 states to 14818 states and 22608 transitions. [2023-11-06 22:09:10,539 INFO L78 Accepts]: Start accepts. Automaton has 14818 states and 22608 transitions. Word has length 518 [2023-11-06 22:09:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:10,540 INFO L495 AbstractCegarLoop]: Abstraction has 14818 states and 22608 transitions. [2023-11-06 22:09:10,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 5.895833333333333) internal successors, (283), 47 states have internal predecessors, (283), 15 states have call successors, (154), 9 states have call predecessors, (154), 17 states have return successors, (154), 14 states have call predecessors, (154), 15 states have call successors, (154) [2023-11-06 22:09:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 14818 states and 22608 transitions. [2023-11-06 22:09:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-06 22:09:10,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:10,548 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:10,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:10,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:10,758 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:10,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1771466953, now seen corresponding path program 1 times [2023-11-06 22:09:10,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:10,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250291484] [2023-11-06 22:09:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:10,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:10,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:09:10,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124046871] [2023-11-06 22:09:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:10,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:10,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:10,841 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:10,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:09:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:11,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:09:11,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:12,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 5422 proven. 147 refuted. 0 times theorem prover too weak. 6135 trivial. 0 not checked. [2023-11-06 22:09:12,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 81 proven. 147 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:09:13,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250291484] [2023-11-06 22:09:13,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:09:13,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124046871] [2023-11-06 22:09:13,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124046871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:13,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:09:13,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-06 22:09:13,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987417180] [2023-11-06 22:09:13,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:13,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:09:13,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:13,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:09:13,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:09:13,465 INFO L87 Difference]: Start difference. First operand 14818 states and 22608 transitions. Second operand has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-06 22:09:23,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:23,915 INFO L93 Difference]: Finished difference Result 58685 states and 89256 transitions. [2023-11-06 22:09:23,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:09:23,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) Word has length 518 [2023-11-06 22:09:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:24,014 INFO L225 Difference]: With dead ends: 58685 [2023-11-06 22:09:24,014 INFO L226 Difference]: Without dead ends: 44094 [2023-11-06 22:09:24,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1025 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:09:24,042 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 1640 mSDsluCounter, 2680 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 3240 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:24,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1744 Valid, 3240 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:09:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44094 states. [2023-11-06 22:09:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44094 to 22510. [2023-11-06 22:09:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22510 states, 19926 states have (on average 1.497189601525645) internal successors, (29833), 19965 states have internal predecessors, (29833), 2060 states have call successors, (2060), 523 states have call predecessors, (2060), 523 states have return successors, (2060), 2021 states have call predecessors, (2060), 2060 states have call successors, (2060) [2023-11-06 22:09:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22510 states to 22510 states and 33953 transitions. [2023-11-06 22:09:29,002 INFO L78 Accepts]: Start accepts. Automaton has 22510 states and 33953 transitions. Word has length 518 [2023-11-06 22:09:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:29,003 INFO L495 AbstractCegarLoop]: Abstraction has 22510 states and 33953 transitions. [2023-11-06 22:09:29,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 4 states have call successors, (154), 3 states have call predecessors, (154), 5 states have return successors, (154), 4 states have call predecessors, (154), 4 states have call successors, (154) [2023-11-06 22:09:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 22510 states and 33953 transitions. [2023-11-06 22:09:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2023-11-06 22:09:29,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:29,012 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:29,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:29,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:29,230 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:29,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash 630948789, now seen corresponding path program 1 times [2023-11-06 22:09:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:29,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358916881] [2023-11-06 22:09:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:29,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:29,331 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:09:29,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001437888] [2023-11-06 22:09:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:29,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:29,336 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:29,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a06ec16-1631-4554-82d0-7698b03b55e4/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:09:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:30,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:09:30,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 7754 proven. 1047 refuted. 0 times theorem prover too weak. 2903 trivial. 0 not checked. [2023-11-06 22:09:42,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 183 proven. 45 refuted. 0 times theorem prover too weak. 11476 trivial. 0 not checked. [2023-11-06 22:09:45,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:45,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358916881] [2023-11-06 22:09:45,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:09:45,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001437888] [2023-11-06 22:09:45,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001437888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:45,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:09:45,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 41 [2023-11-06 22:09:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779029020] [2023-11-06 22:09:45,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:45,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:09:45,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:09:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:09:45,087 INFO L87 Difference]: Start difference. First operand 22510 states and 33953 transitions. Second operand has 41 states, 41 states have (on average 6.585365853658536) internal successors, (270), 39 states have internal predecessors, (270), 11 states have call successors, (154), 10 states have call predecessors, (154), 17 states have return successors, (154), 11 states have call predecessors, (154), 11 states have call successors, (154)