./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.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_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/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_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/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_a6332816-660b-4673-b427-7a3a7a75ff21/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 98bf3444bfc42ab115e7d067c3886787abe4ff198c81ac1a9dcc062a708c7968 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:03:47,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:03:47,595 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:03:47,600 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:03:47,600 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:03:47,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:03:47,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:03:47,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:03:47,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:03:47,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:03:47,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:03:47,629 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:03:47,629 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:03:47,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:03:47,631 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:03:47,631 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:03:47,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:03:47,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:03:47,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:03:47,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:03:47,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:03:47,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:03:47,634 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:03:47,635 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:03:47,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:03:47,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:03:47,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:03:47,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:03:47,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:47,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:03:47,638 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:03:47,638 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:03:47,638 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:03:47,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:03:47,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:03:47,639 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:03:47,639 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:03:47,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:03:47,640 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:03:47,640 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_a6332816-660b-4673-b427-7a3a7a75ff21/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98bf3444bfc42ab115e7d067c3886787abe4ff198c81ac1a9dcc062a708c7968 [2023-11-06 23:03:47,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:03:47,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:03:47,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:03:47,980 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:03:47,980 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:03:47,981 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i [2023-11-06 23:03:51,054 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:03:51,352 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:03:51,353 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i [2023-11-06 23:03:51,381 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/data/a61dde485/29a1027c8dec491297b2f689ce6d81e0/FLAGf55655224 [2023-11-06 23:03:51,397 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/data/a61dde485/29a1027c8dec491297b2f689ce6d81e0 [2023-11-06 23:03:51,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:03:51,411 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:03:51,417 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:51,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:03:51,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:03:51,426 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:51" (1/1) ... [2023-11-06 23:03:51,427 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505c95c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:51, skipping insertion in model container [2023-11-06 23:03:51,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:51" (1/1) ... [2023-11-06 23:03:51,505 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:03:51,671 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_a6332816-660b-4673-b427-7a3a7a75ff21/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i[916,929] [2023-11-06 23:03:51,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:51,960 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:03:51,973 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_a6332816-660b-4673-b427-7a3a7a75ff21/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-18.i[916,929] [2023-11-06 23:03:52,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:03:52,085 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:03:52,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52 WrapperNode [2023-11-06 23:03:52,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:03:52,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:52,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:03:52,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:03:52,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,119 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,204 INFO L138 Inliner]: procedures = 26, calls = 104, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 863 [2023-11-06 23:03:52,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:03:52,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:03:52,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:03:52,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:03:52,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,300 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,326 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,337 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,365 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:03:52,366 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:03:52,367 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:03:52,367 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:03:52,368 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (1/1) ... [2023-11-06 23:03:52,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:03:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:52,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:03:52,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:03:52,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:03:52,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:03:52,508 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:03:52,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:03:52,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:03:52,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:03:52,732 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:03:52,734 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:03:54,146 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:03:54,166 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:03:54,166 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:03:54,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:54 BoogieIcfgContainer [2023-11-06 23:03:54,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:03:54,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:03:54,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:03:54,180 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:03:54,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:51" (1/3) ... [2023-11-06 23:03:54,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eb8665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:54, skipping insertion in model container [2023-11-06 23:03:54,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:52" (2/3) ... [2023-11-06 23:03:54,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eb8665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:54, skipping insertion in model container [2023-11-06 23:03:54,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:54" (3/3) ... [2023-11-06 23:03:54,184 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-18.i [2023-11-06 23:03:54,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:03:54,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:03:54,300 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:03:54,309 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;@2604c5e1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:03:54,310 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:03:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 231 states have (on average 1.6493506493506493) internal successors, (381), 232 states have internal predecessors, (381), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-06 23:03:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 23:03:54,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:54,368 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:54,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:54,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:54,374 INFO L85 PathProgramCache]: Analyzing trace with hash 745417267, now seen corresponding path program 1 times [2023-11-06 23:03:54,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:54,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83059544] [2023-11-06 23:03:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:54,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83059544] [2023-11-06 23:03:54,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:03:54,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204955491] [2023-11-06 23:03:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:54,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:54,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:54,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:55,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:03:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:55,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:03:55,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 16200 trivial. 0 not checked. [2023-11-06 23:03:55,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:55,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204955491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:55,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:55,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:03:55,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549672800] [2023-11-06 23:03:55,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:55,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:03:55,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:03:55,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:03:55,733 INFO L87 Difference]: Start difference. First operand has 325 states, 231 states have (on average 1.6493506493506493) internal successors, (381), 232 states have internal predecessors, (381), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-06 23:03:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:55,815 INFO L93 Difference]: Finished difference Result 643 states and 1211 transitions. [2023-11-06 23:03:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:03:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) Word has length 608 [2023-11-06 23:03:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:55,831 INFO L225 Difference]: With dead ends: 643 [2023-11-06 23:03:55,832 INFO L226 Difference]: Without dead ends: 321 [2023-11-06 23:03:55,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:03:55,844 INFO L413 NwaCegarLoop]: 555 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, 555 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:55,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-06 23:03:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2023-11-06 23:03:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 228 states have (on average 1.6359649122807018) internal successors, (373), 228 states have internal predecessors, (373), 91 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2023-11-06 23:03:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 555 transitions. [2023-11-06 23:03:55,963 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 555 transitions. Word has length 608 [2023-11-06 23:03:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:55,964 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 555 transitions. [2023-11-06 23:03:55,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (91), 2 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-06 23:03:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 555 transitions. [2023-11-06 23:03:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 23:03:55,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:55,991 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:56,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:03:56,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:03:56,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:56,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:56,200 INFO L85 PathProgramCache]: Analyzing trace with hash 670306549, now seen corresponding path program 1 times [2023-11-06 23:03:56,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:56,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000979841] [2023-11-06 23:03:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:56,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:56,449 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:03:56,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603168130] [2023-11-06 23:03:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:56,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:56,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:56,456 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:56,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:03:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:56,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:03:57,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:03:57,308 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:57,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000979841] [2023-11-06 23:03:57,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:03:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603168130] [2023-11-06 23:03:57,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603168130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:57,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:57,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67873076] [2023-11-06 23:03:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:57,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:57,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:57,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:57,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:57,316 INFO L87 Difference]: Start difference. First operand 321 states and 555 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:03:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:57,616 INFO L93 Difference]: Finished difference Result 954 states and 1662 transitions. [2023-11-06 23:03:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 608 [2023-11-06 23:03:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:57,635 INFO L225 Difference]: With dead ends: 954 [2023-11-06 23:03:57,635 INFO L226 Difference]: Without dead ends: 636 [2023-11-06 23:03:57,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:57,640 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 562 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:57,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1459 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2023-11-06 23:03:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 567. [2023-11-06 23:03:57,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 456 states have (on average 1.7214912280701755) internal successors, (785), 457 states have internal predecessors, (785), 108 states have call successors, (108), 2 states have call predecessors, (108), 2 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2023-11-06 23:03:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1001 transitions. [2023-11-06 23:03:57,750 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1001 transitions. Word has length 608 [2023-11-06 23:03:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:57,753 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1001 transitions. [2023-11-06 23:03:57,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:03:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1001 transitions. [2023-11-06 23:03:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 23:03:57,761 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:57,762 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:57,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:57,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:57,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1811772165, now seen corresponding path program 1 times [2023-11-06 23:03:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:57,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584116396] [2023-11-06 23:03:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:57,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:58,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:03:58,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231498241] [2023-11-06 23:03:58,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:58,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:58,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:58,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:58,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:58,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:03:58,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:03:58,834 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:58,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:58,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584116396] [2023-11-06 23:03:58,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:03:58,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231498241] [2023-11-06 23:03:58,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231498241] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:58,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:58,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:03:58,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933664377] [2023-11-06 23:03:58,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:58,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:03:58,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:58,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:03:58,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:03:58,841 INFO L87 Difference]: Start difference. First operand 567 states and 1001 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:03:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:58,951 INFO L93 Difference]: Finished difference Result 1568 states and 2781 transitions. [2023-11-06 23:03:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:03:58,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 608 [2023-11-06 23:03:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:58,969 INFO L225 Difference]: With dead ends: 1568 [2023-11-06 23:03:58,969 INFO L226 Difference]: Without dead ends: 1004 [2023-11-06 23:03:58,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:03:58,975 INFO L413 NwaCegarLoop]: 806 mSDtfsCounter, 360 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:58,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1329 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2023-11-06 23:03:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 1001. [2023-11-06 23:03:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 846 states have (on average 1.7458628841607564) internal successors, (1477), 849 states have internal predecessors, (1477), 150 states have call successors, (150), 4 states have call predecessors, (150), 4 states have return successors, (150), 147 states have call predecessors, (150), 150 states have call successors, (150) [2023-11-06 23:03:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1777 transitions. [2023-11-06 23:03:59,069 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1777 transitions. Word has length 608 [2023-11-06 23:03:59,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:59,070 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 1777 transitions. [2023-11-06 23:03:59,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:03:59,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1777 transitions. [2023-11-06 23:03:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 23:03:59,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:59,080 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:59,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:59,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:03:59,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash 542613117, now seen corresponding path program 1 times [2023-11-06 23:03:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:59,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650180713] [2023-11-06 23:03:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:59,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:59,404 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:03:59,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949651438] [2023-11-06 23:03:59,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:59,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:59,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:59,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:59,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:03:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:59,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 1488 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:03:59,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:04:00,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:00,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:00,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650180713] [2023-11-06 23:04:00,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:00,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949651438] [2023-11-06 23:04:00,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949651438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:00,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:00,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:04:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049692201] [2023-11-06 23:04:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:00,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:00,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:00,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:00,827 INFO L87 Difference]: Start difference. First operand 1001 states and 1777 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:00,940 INFO L93 Difference]: Finished difference Result 2979 states and 5296 transitions. [2023-11-06 23:04:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:00,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 608 [2023-11-06 23:04:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:00,959 INFO L225 Difference]: With dead ends: 2979 [2023-11-06 23:04:00,959 INFO L226 Difference]: Without dead ends: 1981 [2023-11-06 23:04:00,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:00,968 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 275 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:00,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 1118 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:00,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2023-11-06 23:04:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1979. [2023-11-06 23:04:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1670 states have (on average 1.7467065868263474) internal successors, (2917), 1676 states have internal predecessors, (2917), 300 states have call successors, (300), 8 states have call predecessors, (300), 8 states have return successors, (300), 294 states have call predecessors, (300), 300 states have call successors, (300) [2023-11-06 23:04:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 3517 transitions. [2023-11-06 23:04:01,169 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 3517 transitions. Word has length 608 [2023-11-06 23:04:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:01,171 INFO L495 AbstractCegarLoop]: Abstraction has 1979 states and 3517 transitions. [2023-11-06 23:04:01,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 3517 transitions. [2023-11-06 23:04:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-06 23:04:01,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:01,205 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:01,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 23:04:01,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:01,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:01,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash 744437051, now seen corresponding path program 1 times [2023-11-06 23:04:01,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:01,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33917597] [2023-11-06 23:04:01,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:01,525 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:01,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597454989] [2023-11-06 23:04:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:01,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:01,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:01,527 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:01,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:04:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:02,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:04:02,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:04:02,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:02,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:02,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33917597] [2023-11-06 23:04:02,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:02,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597454989] [2023-11-06 23:04:02,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597454989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:02,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:02,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:04:02,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318740845] [2023-11-06 23:04:02,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:02,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:02,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:02,118 INFO L87 Difference]: Start difference. First operand 1979 states and 3517 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:02,396 INFO L93 Difference]: Finished difference Result 5893 states and 10469 transitions. [2023-11-06 23:04:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:02,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 608 [2023-11-06 23:04:02,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:02,430 INFO L225 Difference]: With dead ends: 5893 [2023-11-06 23:04:02,430 INFO L226 Difference]: Without dead ends: 3917 [2023-11-06 23:04:02,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:02,438 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 536 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:02,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1080 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2023-11-06 23:04:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3915. [2023-11-06 23:04:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3298 states have (on average 1.7313523347483324) internal successors, (5710), 3310 states have internal predecessors, (5710), 600 states have call successors, (600), 16 states have call predecessors, (600), 16 states have return successors, (600), 588 states have call predecessors, (600), 600 states have call successors, (600) [2023-11-06 23:04:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 6910 transitions. [2023-11-06 23:04:02,843 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 6910 transitions. Word has length 608 [2023-11-06 23:04:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:02,845 INFO L495 AbstractCegarLoop]: Abstraction has 3915 states and 6910 transitions. [2023-11-06 23:04:02,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 6910 transitions. [2023-11-06 23:04:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-06 23:04:02,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:02,857 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:02,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:03,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:03,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:03,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1018105988, now seen corresponding path program 1 times [2023-11-06 23:04:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357427721] [2023-11-06 23:04:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:03,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754864416] [2023-11-06 23:04:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:03,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:03,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:03,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:04:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:03,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 1490 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:04:03,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:04:03,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:03,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357427721] [2023-11-06 23:04:03,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754864416] [2023-11-06 23:04:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754864416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:03,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:04:03,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371293556] [2023-11-06 23:04:03,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:03,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:04:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:04:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:03,752 INFO L87 Difference]: Start difference. First operand 3915 states and 6910 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:04,099 INFO L93 Difference]: Finished difference Result 10931 states and 19180 transitions. [2023-11-06 23:04:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:04:04,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 609 [2023-11-06 23:04:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:04,153 INFO L225 Difference]: With dead ends: 10931 [2023-11-06 23:04:04,154 INFO L226 Difference]: Without dead ends: 7019 [2023-11-06 23:04:04,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:04:04,166 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 527 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:04,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1244 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:04:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7019 states. [2023-11-06 23:04:05,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7019 to 7017. [2023-11-06 23:04:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7017 states, 5784 states have (on average 1.7005532503457814) internal successors, (9836), 5808 states have internal predecessors, (9836), 1200 states have call successors, (1200), 32 states have call predecessors, (1200), 32 states have return successors, (1200), 1176 states have call predecessors, (1200), 1200 states have call successors, (1200) [2023-11-06 23:04:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7017 states to 7017 states and 12236 transitions. [2023-11-06 23:04:05,144 INFO L78 Accepts]: Start accepts. Automaton has 7017 states and 12236 transitions. Word has length 609 [2023-11-06 23:04:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:05,146 INFO L495 AbstractCegarLoop]: Abstraction has 7017 states and 12236 transitions. [2023-11-06 23:04:05,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7017 states and 12236 transitions. [2023-11-06 23:04:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-06 23:04:05,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:05,167 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:05,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:05,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:04:05,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:05,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash -570241914, now seen corresponding path program 1 times [2023-11-06 23:04:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141424336] [2023-11-06 23:04:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:05,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:05,493 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:05,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625981093] [2023-11-06 23:04:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:05,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:05,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:05,495 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:05,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:04:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:06,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 1491 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:06,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 6874 proven. 78 refuted. 0 times theorem prover too weak. 9428 trivial. 0 not checked. [2023-11-06 23:04:06,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 192 proven. 78 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-06 23:04:07,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141424336] [2023-11-06 23:04:07,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:07,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625981093] [2023-11-06 23:04:07,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625981093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:07,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:07,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:04:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509071232] [2023-11-06 23:04:07,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:07,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:07,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:07,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:07,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:07,007 INFO L87 Difference]: Start difference. First operand 7017 states and 12236 transitions. Second operand has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-06 23:04:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:08,155 INFO L93 Difference]: Finished difference Result 14127 states and 24557 transitions. [2023-11-06 23:04:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:08,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) Word has length 609 [2023-11-06 23:04:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:08,215 INFO L225 Difference]: With dead ends: 14127 [2023-11-06 23:04:08,215 INFO L226 Difference]: Without dead ends: 7113 [2023-11-06 23:04:08,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1210 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:08,234 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 966 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:08,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 1169 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:04:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2023-11-06 23:04:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 7049. [2023-11-06 23:04:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7049 states, 5808 states have (on average 1.6914600550964187) internal successors, (9824), 5832 states have internal predecessors, (9824), 1200 states have call successors, (1200), 40 states have call predecessors, (1200), 40 states have return successors, (1200), 1176 states have call predecessors, (1200), 1200 states have call successors, (1200) [2023-11-06 23:04:09,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 12224 transitions. [2023-11-06 23:04:09,025 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 12224 transitions. Word has length 609 [2023-11-06 23:04:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:09,026 INFO L495 AbstractCegarLoop]: Abstraction has 7049 states and 12224 transitions. [2023-11-06 23:04:09,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.375) internal successors, (235), 8 states have internal predecessors, (235), 3 states have call successors, (117), 2 states have call predecessors, (117), 4 states have return successors, (118), 3 states have call predecessors, (118), 3 states have call successors, (118) [2023-11-06 23:04:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 12224 transitions. [2023-11-06 23:04:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-11-06 23:04:09,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:09,040 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:09,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:09,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:04:09,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:09,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2065299808, now seen corresponding path program 1 times [2023-11-06 23:04:09,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258544957] [2023-11-06 23:04:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:09,382 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:09,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182452943] [2023-11-06 23:04:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:09,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:09,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:04:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:09,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:10,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:04:11,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:11,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:11,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258544957] [2023-11-06 23:04:11,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:11,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182452943] [2023-11-06 23:04:11,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182452943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:11,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:11,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:04:11,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472889595] [2023-11-06 23:04:11,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:11,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:11,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:11,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:11,894 INFO L87 Difference]: Start difference. First operand 7049 states and 12224 transitions. Second operand has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:13,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:13,872 INFO L93 Difference]: Finished difference Result 25403 states and 43980 transitions. [2023-11-06 23:04:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:04:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 611 [2023-11-06 23:04:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:13,931 INFO L225 Difference]: With dead ends: 25403 [2023-11-06 23:04:13,931 INFO L226 Difference]: Without dead ends: 18357 [2023-11-06 23:04:13,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:13,955 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1405 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 2553 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:13,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 2553 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:04:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18357 states. [2023-11-06 23:04:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18357 to 15243. [2023-11-06 23:04:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15243 states, 12762 states have (on average 1.7052186177715092) internal successors, (21762), 12810 states have internal predecessors, (21762), 2400 states have call successors, (2400), 80 states have call predecessors, (2400), 80 states have return successors, (2400), 2352 states have call predecessors, (2400), 2400 states have call successors, (2400) [2023-11-06 23:04:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15243 states to 15243 states and 26562 transitions. [2023-11-06 23:04:15,752 INFO L78 Accepts]: Start accepts. Automaton has 15243 states and 26562 transitions. Word has length 611 [2023-11-06 23:04:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:15,754 INFO L495 AbstractCegarLoop]: Abstraction has 15243 states and 26562 transitions. [2023-11-06 23:04:15,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 15243 states and 26562 transitions. [2023-11-06 23:04:15,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-11-06 23:04:15,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:15,779 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:15,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:15,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 23:04:15,988 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:15,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1458106470, now seen corresponding path program 1 times [2023-11-06 23:04:15,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:15,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118414842] [2023-11-06 23:04:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:15,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:16,090 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523158155] [2023-11-06 23:04:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:16,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:16,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:16,093 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:16,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:04:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:16,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 1495 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:04:16,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:04:16,830 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:16,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118414842] [2023-11-06 23:04:16,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:16,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523158155] [2023-11-06 23:04:16,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523158155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:16,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:16,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:16,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968300657] [2023-11-06 23:04:16,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:16,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:16,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:16,836 INFO L87 Difference]: Start difference. First operand 15243 states and 26562 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:18,296 INFO L93 Difference]: Finished difference Result 37103 states and 63995 transitions. [2023-11-06 23:04:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:04:18,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 611 [2023-11-06 23:04:18,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:18,366 INFO L225 Difference]: With dead ends: 37103 [2023-11-06 23:04:18,367 INFO L226 Difference]: Without dead ends: 21863 [2023-11-06 23:04:18,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:18,404 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 355 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:18,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1865 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:04:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21863 states. [2023-11-06 23:04:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21863 to 21683. [2023-11-06 23:04:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21683 states, 17442 states have (on average 1.6572640752207315) internal successors, (28906), 17554 states have internal predecessors, (28906), 4096 states have call successors, (4096), 144 states have call predecessors, (4096), 144 states have return successors, (4096), 3984 states have call predecessors, (4096), 4096 states have call successors, (4096) [2023-11-06 23:04:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21683 states to 21683 states and 37098 transitions. [2023-11-06 23:04:20,616 INFO L78 Accepts]: Start accepts. Automaton has 21683 states and 37098 transitions. Word has length 611 [2023-11-06 23:04:20,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:20,618 INFO L495 AbstractCegarLoop]: Abstraction has 21683 states and 37098 transitions. [2023-11-06 23:04:20,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 21683 states and 37098 transitions. [2023-11-06 23:04:20,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-11-06 23:04:20,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:20,641 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:20,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:20,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:20,852 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:20,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1031422492, now seen corresponding path program 1 times [2023-11-06 23:04:20,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:20,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824713458] [2023-11-06 23:04:20,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:20,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:20,934 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:20,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681444267] [2023-11-06 23:04:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:20,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:20,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:20,936 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:20,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:04:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:21,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:21,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 5088 proven. 219 refuted. 0 times theorem prover too weak. 11073 trivial. 0 not checked. [2023-11-06 23:04:22,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 51 proven. 219 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-06 23:04:22,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:22,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824713458] [2023-11-06 23:04:22,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:22,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681444267] [2023-11-06 23:04:22,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681444267] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:22,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:22,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:04:22,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299106754] [2023-11-06 23:04:22,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:22,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:04:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:22,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:04:22,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:22,807 INFO L87 Difference]: Start difference. First operand 21683 states and 37098 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) [2023-11-06 23:04:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:24,492 INFO L93 Difference]: Finished difference Result 35519 states and 59977 transitions. [2023-11-06 23:04:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) Word has length 611 [2023-11-06 23:04:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:24,550 INFO L225 Difference]: With dead ends: 35519 [2023-11-06 23:04:24,551 INFO L226 Difference]: Without dead ends: 13839 [2023-11-06 23:04:24,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1224 GetRequests, 1214 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:24,595 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 973 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:24,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 1160 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:24,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2023-11-06 23:04:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 13583. [2023-11-06 23:04:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13583 states, 10366 states have (on average 1.6000385876905268) internal successors, (16586), 10414 states have internal predecessors, (16586), 3008 states have call successors, (3008), 208 states have call predecessors, (3008), 208 states have return successors, (3008), 2960 states have call predecessors, (3008), 3008 states have call successors, (3008) [2023-11-06 23:04:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13583 states to 13583 states and 22602 transitions. [2023-11-06 23:04:26,198 INFO L78 Accepts]: Start accepts. Automaton has 13583 states and 22602 transitions. Word has length 611 [2023-11-06 23:04:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:26,199 INFO L495 AbstractCegarLoop]: Abstraction has 13583 states and 22602 transitions. [2023-11-06 23:04:26,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) [2023-11-06 23:04:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 13583 states and 22602 transitions. [2023-11-06 23:04:26,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-06 23:04:26,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:26,224 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:26,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:26,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:26,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:26,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:26,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1489644709, now seen corresponding path program 1 times [2023-11-06 23:04:26,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:26,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556018277] [2023-11-06 23:04:26,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:26,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:26,537 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:26,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793941156] [2023-11-06 23:04:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:26,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:26,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:26,539 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:26,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:04:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:27,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:04:27,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:04:27,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:27,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556018277] [2023-11-06 23:04:27,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793941156] [2023-11-06 23:04:27,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793941156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:27,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:04:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035994940] [2023-11-06 23:04:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:27,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:04:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:04:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:27,557 INFO L87 Difference]: Start difference. First operand 13583 states and 22602 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:29,620 INFO L93 Difference]: Finished difference Result 40743 states and 67800 transitions. [2023-11-06 23:04:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:04:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 612 [2023-11-06 23:04:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:29,728 INFO L225 Difference]: With dead ends: 40743 [2023-11-06 23:04:29,728 INFO L226 Difference]: Without dead ends: 27163 [2023-11-06 23:04:29,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:04:29,857 INFO L413 NwaCegarLoop]: 933 mSDtfsCounter, 1134 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:29,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 1286 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:04:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27163 states. [2023-11-06 23:04:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27163 to 27161. [2023-11-06 23:04:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27161 states, 20728 states have (on average 1.5930142802006948) internal successors, (33020), 20824 states have internal predecessors, (33020), 6016 states have call successors, (6016), 416 states have call predecessors, (6016), 416 states have return successors, (6016), 5920 states have call predecessors, (6016), 6016 states have call successors, (6016) [2023-11-06 23:04:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27161 states to 27161 states and 45052 transitions. [2023-11-06 23:04:32,565 INFO L78 Accepts]: Start accepts. Automaton has 27161 states and 45052 transitions. Word has length 612 [2023-11-06 23:04:32,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:32,566 INFO L495 AbstractCegarLoop]: Abstraction has 27161 states and 45052 transitions. [2023-11-06 23:04:32,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:32,567 INFO L276 IsEmpty]: Start isEmpty. Operand 27161 states and 45052 transitions. [2023-11-06 23:04:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 613 [2023-11-06 23:04:32,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:32,731 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:32,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:32,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:32,940 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:32,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1544037607, now seen corresponding path program 1 times [2023-11-06 23:04:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:32,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57736252] [2023-11-06 23:04:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:32,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:33,018 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:33,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343663708] [2023-11-06 23:04:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:33,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:33,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:04:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:33,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:33,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 7410 proven. 90 refuted. 0 times theorem prover too weak. 8880 trivial. 0 not checked. [2023-11-06 23:04:34,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 180 proven. 90 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-06 23:04:34,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:34,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57736252] [2023-11-06 23:04:34,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:34,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343663708] [2023-11-06 23:04:34,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343663708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:34,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:34,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:04:34,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539532028] [2023-11-06 23:04:34,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:34,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:04:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:34,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:04:34,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:04:34,495 INFO L87 Difference]: Start difference. First operand 27161 states and 45052 transitions. Second operand has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-06 23:04:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:36,808 INFO L93 Difference]: Finished difference Result 54959 states and 90709 transitions. [2023-11-06 23:04:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:04:36,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) Word has length 612 [2023-11-06 23:04:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:36,904 INFO L225 Difference]: With dead ends: 54959 [2023-11-06 23:04:36,904 INFO L226 Difference]: Without dead ends: 27801 [2023-11-06 23:04:36,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 1216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:04:36,962 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 697 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:36,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 1175 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:04:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27801 states. [2023-11-06 23:04:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27801 to 27289. [2023-11-06 23:04:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27289 states, 20824 states have (on average 1.5810603150211295) internal successors, (32924), 20920 states have internal predecessors, (32924), 6016 states have call successors, (6016), 448 states have call predecessors, (6016), 448 states have return successors, (6016), 5920 states have call predecessors, (6016), 6016 states have call successors, (6016) [2023-11-06 23:04:39,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27289 states to 27289 states and 44956 transitions. [2023-11-06 23:04:39,883 INFO L78 Accepts]: Start accepts. Automaton has 27289 states and 44956 transitions. Word has length 612 [2023-11-06 23:04:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:39,884 INFO L495 AbstractCegarLoop]: Abstraction has 27289 states and 44956 transitions. [2023-11-06 23:04:39,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-06 23:04:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 27289 states and 44956 transitions. [2023-11-06 23:04:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2023-11-06 23:04:39,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:39,901 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:39,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:40,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:04:40,111 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:40,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:40,111 INFO L85 PathProgramCache]: Analyzing trace with hash 440769477, now seen corresponding path program 1 times [2023-11-06 23:04:40,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:40,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826665579] [2023-11-06 23:04:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:40,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:40,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1032843757] [2023-11-06 23:04:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:40,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:40,187 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:40,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:04:40,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:40,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:04:40,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 8250 proven. 126 refuted. 0 times theorem prover too weak. 8004 trivial. 0 not checked. [2023-11-06 23:04:41,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 144 proven. 126 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-06 23:04:41,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:41,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826665579] [2023-11-06 23:04:41,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:41,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032843757] [2023-11-06 23:04:41,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032843757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:41,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:41,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:04:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441993580] [2023-11-06 23:04:41,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:41,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:04:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:04:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:04:41,805 INFO L87 Difference]: Start difference. First operand 27289 states and 44956 transitions. Second operand has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-11-06 23:04:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:43,854 INFO L93 Difference]: Finished difference Result 45175 states and 74461 transitions. [2023-11-06 23:04:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) Word has length 613 [2023-11-06 23:04:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:43,894 INFO L225 Difference]: With dead ends: 45175 [2023-11-06 23:04:43,895 INFO L226 Difference]: Without dead ends: 17445 [2023-11-06 23:04:43,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1228 GetRequests, 1218 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:43,938 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 924 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:43,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 1128 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:04:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17445 states. [2023-11-06 23:04:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17445 to 16917. [2023-11-06 23:04:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16917 states, 12916 states have (on average 1.5701455558996593) internal successors, (20280), 12948 states have internal predecessors, (20280), 3712 states have call successors, (3712), 288 states have call predecessors, (3712), 288 states have return successors, (3712), 3680 states have call predecessors, (3712), 3712 states have call successors, (3712) [2023-11-06 23:04:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16917 states to 16917 states and 27704 transitions. [2023-11-06 23:04:45,924 INFO L78 Accepts]: Start accepts. Automaton has 16917 states and 27704 transitions. Word has length 613 [2023-11-06 23:04:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:45,928 INFO L495 AbstractCegarLoop]: Abstraction has 16917 states and 27704 transitions. [2023-11-06 23:04:45,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.285714285714285) internal successors, (170), 7 states have internal predecessors, (170), 2 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 2 states have call predecessors, (134), 2 states have call successors, (134) [2023-11-06 23:04:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 16917 states and 27704 transitions. [2023-11-06 23:04:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2023-11-06 23:04:45,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:45,943 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:45,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-06 23:04:46,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:46,143 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:46,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:46,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1586697287, now seen corresponding path program 1 times [2023-11-06 23:04:46,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:46,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698551763] [2023-11-06 23:04:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:46,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:46,238 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:46,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805997379] [2023-11-06 23:04:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:46,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:46,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:46,240 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:46,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:04:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:04:46,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:48,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:04:48,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:04:48,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698551763] [2023-11-06 23:04:48,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805997379] [2023-11-06 23:04:48,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805997379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:48,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:48,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:04:48,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567052397] [2023-11-06 23:04:48,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:48,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:04:48,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:04:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:04:48,128 INFO L87 Difference]: Start difference. First operand 16917 states and 27704 transitions. Second operand has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:50,399 INFO L93 Difference]: Finished difference Result 49563 states and 81655 transitions. [2023-11-06 23:04:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:50,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 613 [2023-11-06 23:04:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:50,467 INFO L225 Difference]: With dead ends: 49563 [2023-11-06 23:04:50,468 INFO L226 Difference]: Without dead ends: 31529 [2023-11-06 23:04:50,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:04:50,501 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 1469 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:50,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 2037 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:04:50,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31529 states. [2023-11-06 23:04:52,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31529 to 18473. [2023-11-06 23:04:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18473 states, 14472 states have (on average 1.5854063018242124) internal successors, (22944), 14504 states have internal predecessors, (22944), 3712 states have call successors, (3712), 288 states have call predecessors, (3712), 288 states have return successors, (3712), 3680 states have call predecessors, (3712), 3712 states have call successors, (3712) [2023-11-06 23:04:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18473 states to 18473 states and 30368 transitions. [2023-11-06 23:04:52,880 INFO L78 Accepts]: Start accepts. Automaton has 18473 states and 30368 transitions. Word has length 613 [2023-11-06 23:04:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:52,881 INFO L495 AbstractCegarLoop]: Abstraction has 18473 states and 30368 transitions. [2023-11-06 23:04:52,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.833333333333332) internal successors, (161), 6 states have internal predecessors, (161), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:04:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 18473 states and 30368 transitions. [2023-11-06 23:04:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2023-11-06 23:04:52,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:52,896 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:04:52,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:53,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:53,111 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:04:53,111 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash -48357257, now seen corresponding path program 1 times [2023-11-06 23:04:53,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:53,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50522323] [2023-11-06 23:04:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:53,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:53,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:04:53,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694237144] [2023-11-06 23:04:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:53,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:53,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:53,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:53,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:04:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:54,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:04:54,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 10804 proven. 291 refuted. 0 times theorem prover too weak. 5285 trivial. 0 not checked. [2023-11-06 23:04:55,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 243 proven. 294 refuted. 0 times theorem prover too weak. 15843 trivial. 0 not checked. [2023-11-06 23:04:56,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:56,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50522323] [2023-11-06 23:04:56,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:04:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694237144] [2023-11-06 23:04:56,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694237144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:56,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:56,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 23:04:56,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809201251] [2023-11-06 23:04:56,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:56,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:04:56,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:56,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:04:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:04:56,549 INFO L87 Difference]: Start difference. First operand 18473 states and 30368 transitions. Second operand has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 5 states have call successors, (153), 3 states have call predecessors, (153), 7 states have return successors, (154), 5 states have call predecessors, (154), 5 states have call successors, (154) [2023-11-06 23:05:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:01,143 INFO L93 Difference]: Finished difference Result 57575 states and 93479 transitions. [2023-11-06 23:05:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:05:01,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 5 states have call successors, (153), 3 states have call predecessors, (153), 7 states have return successors, (154), 5 states have call predecessors, (154), 5 states have call successors, (154) Word has length 613 [2023-11-06 23:05:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:01,213 INFO L225 Difference]: With dead ends: 57575 [2023-11-06 23:05:01,213 INFO L226 Difference]: Without dead ends: 39105 [2023-11-06 23:05:01,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1241 GetRequests, 1212 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2023-11-06 23:05:01,243 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 2062 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2091 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:01,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2091 Valid, 2273 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 23:05:01,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39105 states. [2023-11-06 23:05:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39105 to 29605. [2023-11-06 23:05:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29605 states, 23684 states have (on average 1.5821651748015537) internal successors, (37472), 23780 states have internal predecessors, (37472), 5376 states have call successors, (5376), 544 states have call predecessors, (5376), 544 states have return successors, (5376), 5280 states have call predecessors, (5376), 5376 states have call successors, (5376) [2023-11-06 23:05:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29605 states to 29605 states and 48224 transitions. [2023-11-06 23:05:04,128 INFO L78 Accepts]: Start accepts. Automaton has 29605 states and 48224 transitions. Word has length 613 [2023-11-06 23:05:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:04,129 INFO L495 AbstractCegarLoop]: Abstraction has 29605 states and 48224 transitions. [2023-11-06 23:05:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 5 states have call successors, (153), 3 states have call predecessors, (153), 7 states have return successors, (154), 5 states have call predecessors, (154), 5 states have call successors, (154) [2023-11-06 23:05:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 29605 states and 48224 transitions. [2023-11-06 23:05:04,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-06 23:05:04,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:04,148 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:04,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 23:05:04,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:05:04,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:04,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1028566878, now seen corresponding path program 1 times [2023-11-06 23:05:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:04,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190213982] [2023-11-06 23:05:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:04,456 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:04,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529297219] [2023-11-06 23:05:04,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:04,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:04,458 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:04,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:05:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:05,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:05:05,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:05:05,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:05:05,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190213982] [2023-11-06 23:05:05,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:05,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529297219] [2023-11-06 23:05:05,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529297219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:05:05,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:05:05,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:05:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6926241] [2023-11-06 23:05:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:05,288 INFO L87 Difference]: Start difference. First operand 29605 states and 48224 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:05:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:07,602 INFO L93 Difference]: Finished difference Result 59271 states and 96573 transitions. [2023-11-06 23:05:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:07,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 614 [2023-11-06 23:05:07,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:07,649 INFO L225 Difference]: With dead ends: 59271 [2023-11-06 23:05:07,649 INFO L226 Difference]: Without dead ends: 29669 [2023-11-06 23:05:07,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:05:07,678 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 0 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:07,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1072 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:05:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29669 states. [2023-11-06 23:05:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29669 to 29669. [2023-11-06 23:05:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29669 states, 23748 states have (on average 1.5805962607377464) internal successors, (37536), 23844 states have internal predecessors, (37536), 5376 states have call successors, (5376), 544 states have call predecessors, (5376), 544 states have return successors, (5376), 5280 states have call predecessors, (5376), 5376 states have call successors, (5376) [2023-11-06 23:05:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29669 states to 29669 states and 48288 transitions. [2023-11-06 23:05:10,595 INFO L78 Accepts]: Start accepts. Automaton has 29669 states and 48288 transitions. Word has length 614 [2023-11-06 23:05:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:10,595 INFO L495 AbstractCegarLoop]: Abstraction has 29669 states and 48288 transitions. [2023-11-06 23:05:10,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:05:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 29669 states and 48288 transitions. [2023-11-06 23:05:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2023-11-06 23:05:10,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:10,606 INFO L195 NwaCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:05:10,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:10,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:05:10,807 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:05:10,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash -668728154, now seen corresponding path program 1 times [2023-11-06 23:05:10,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:10,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483239290] [2023-11-06 23:05:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:10,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:10,900 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:05:10,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623505644] [2023-11-06 23:05:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:10,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:10,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:10,903 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:10,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a6332816-660b-4673-b427-7a3a7a75ff21/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:05:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:11,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1498 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:05:11,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 8238 proven. 144 refuted. 0 times theorem prover too weak. 7998 trivial. 0 not checked. [2023-11-06 23:05:12,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16380 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16380 trivial. 0 not checked. [2023-11-06 23:05:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:12,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483239290] [2023-11-06 23:05:12,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:05:12,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623505644] [2023-11-06 23:05:12,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623505644] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:12,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:05:12,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-06 23:05:12,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296500338] [2023-11-06 23:05:12,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:12,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:05:12,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:05:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:12,922 INFO L87 Difference]: Start difference. First operand 29669 states and 48288 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) [2023-11-06 23:05:15,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:15,178 INFO L93 Difference]: Finished difference Result 59335 states and 96573 transitions. [2023-11-06 23:05:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:05:15,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (91), 1 states have call predecessors, (91), 1 states have return successors, (91), 1 states have call predecessors, (91), 1 states have call successors, (91) Word has length 614 [2023-11-06 23:05:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:15,225 INFO L225 Difference]: With dead ends: 59335 [2023-11-06 23:05:15,225 INFO L226 Difference]: Without dead ends: 29669 [2023-11-06 23:05:15,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 1221 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:05:15,257 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 520 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:15,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 535 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:05:15,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29669 states.